Error in While loop

Hi,
I want to write a while loop to compare 2 variables: I tried the below options but no success.
while [$i -le $ROWS] gives "unary operator expected"
while [${i} -le ${ROWS}] same error
while ["$i" -le "$ROWS"] gives "integer expression expected"
I am using BASH. Please Help.
Yogini

Ohhh..it was my mistake. I was redirecting the SQL query output to somewhere else..so ROWS was NULL.
The code is working now.
Thanks!
Yogini

Similar Messages

How to get the last error for while loop?

How to get the last error for while loop? I just want transfer the last error for while loop, but the program use the shift register shift all error every cycle.

What do you mean by "get" and "transfer"?
If the shift register is not what you want, use a plan tunnel instead.
Typically, programmers are interested in the first, not last, error.
Can you show us your code so we have a better idea what you are trying to?
LabVIEW Champion . Do more with less code and in less time .

My daq 6008 wil not drop the 5V after the VI is stopped, i have a digital signal going from the error out on the daq in the while loop to the error in on the daq outside the while loop and a boolean going to the data of the daq outside

my daq 6008 wil not drop the 5V on a digital output after the VI is stopped, i have a digital signal going from the error out on the daq in the while loop to the error in on the daq outside the while loop and a boolean going to the data of the daq outside, but i can t seemto get it to work

i attached the block diagram so you can have a look
Attachments:
PID Temp control.docx ‏120 KB

Error in a while loop formula

I am trying to use a while loop formula to show the characters in a field up to the open parentheses '(', however I am recieving an error message saying: 'A subscript must be between 1 and the length of the string.'_
There are values in the field that will not have any perentheses at all, such as 'N/A' and I think this may be what is returning the error?? My original formula is:
local NumberVar i:=1;
Local StringVar Severity;
while {Issue_Lookups_1.Name}<> '(' do
(if {Issue_Lookups_1.Name}<> '(' then Severity:= Severity + {Issue_Lookups_1.Name};
i:= i+1);
Severity
I also tried this variation, creating a secong formula to exclude any values = to N/A
First formula:
if {Issue_Lookups_1.Name}<> "N/A" then {Issue_Lookups_1.Name} else ''
While Loop formula:
local NumberVar i:=1;
Local StringVar Severity;
while {@Severity<>N/A}<> '(' do
(if {@Severity<>N/A}<> '(' then Severity:= Severity + {@Severity<>N/A};
i:= i+1);
Severity

Try this
local NumberVar i:=1;
Local StringVar Severity;
while not({@SeverityN/A} = '(') do
(if not({Issue_Lookups_1.Name} ='(' ) then Severity:= Severity + {Issue_Lookups_1.Name};
i:= i+1);
Severity
Regards,
Raghavendra
Edited by: Raghavendra Gadhamsetty on Feb 11, 2009 6:56 PM

While loop error

I can't seem to find the soultion to the following error message:
G:\UOP\POS 406\Java Assignements\Week 3, Assignment 2\MortgageCalcV1.java:53: variable option might not have been initialized
               while ((option == 'Y') || (option == 'y'))
               ^
1 error
Tool completed with exit code 1
The following is my code starting with the while line to the end of while statement:
//While statement to prompt user to continue to use calculator or to quit.
               while ((option == 'Y') || (option == 'y'))
               { //begin loop
                    System.out.print("Enter the amount to be financed: $");
                    StrPrincpal = dataIn.readLine (); //Places data into the string StrPrincpal
                    princpal = Double.parseDouble (StrPrincpal);
                    System.out.println();
                    System.out.print("Enter the rate: ");
                    StrIntRate = dataIn.readLine (); //Places data into the string StrPrincpal
                    IntRate = Double.parseDouble (StrIntRate);
                    System.out.println();
                    System.out.print("Enter the term of the loan: ");
                    StrTerm = dataIn.readLine (); //Places data into the string StrPrincpal
                    term = Integer.parseInt (StrTerm);
                    System.out.println();
                    //Calculation
                    rate = (IntRate / 100.0) / 12.0;     // converts % to decimal format
                    Calpymt = rate + 1;                         // calculate interest
                    term = 30*12;                              // calculate number of years to number of months
                    pymt = princpal * (Math.pow(Calpymt, term) * rate)/ (Math.pow (Calpymt, term) -1);      // formula to calculate monthly payment
                    System.out.println("\nMonthly payment will be: " + moneyFormat.format(pymt) + "\n"); // outputs monthly payment to screen
                    System.out.println("Date of report:" + currentDate);
                   System.out.println("\n"); // create a blank line after output
                   //User response required y or n to refresh the calculator to perform another calculation
                   System.out.println("Do you wish to calculate another mortgage?\n");
                   System.out.print("Please Enter Y or N:\t");
                   System.out.println("\n");
               option = (char)System.in.read();
                         //StrResponse = dataIn.readLine();
                         //option = Character.parseChar(StrResponse);
                         //} //close while loop
               } //close loopI have defind variable as char option;
Thanks for any assistance you can give me on this issue.

This is quite common in novice coding. Especially if it's for a uni assignment ;)
The important thing is that you take the time to understand what the compiler is trying to tell you.
on line 53, the variable "option" is compared to 'Y'. However, if you have only declared "option":-
char option;
as opposed to:-
char option = OPTION_DEFAULT_VALUE;
The Java compiler cannot compile the program if "option" might not have been initialised. If "option" isn't initialised, you'll get an exception when you try to enter the while loop.
Initialise option with a default value before the logic that sets it occurs.
And try to understand what the compiler is telling you.

Error -50103 occured with timed loop inside a while loop

Hello everyone,
i wrote an application to sample analog voltage from DAQ6024E card (see the attachments).
I have a big while loop in the VI because a I want to add some other functions later.
In the "WHILE_Cont Acq&Graph Voltage-Int Clk.vi" I use a while loop inside the big while loop to read the samples. It's working properly.
but when I use a timed loop inside the big while loop (see "TIMED_LOOP_Cont Acq&Graph Voltage-Int Clk.vi"), I get an error -50103 from the timed loop. It seems that the first cycle is ok, but after the first cycle the error occurs.
I don't know what happens with the timed loop, anyone can help me? what does the error -50103 mean? thanks a lot!
PS: I am using LabVIEW 8.0
Message Edited by molo511 on 10-22-2006 05:21 AM
Message Edited by molo511 on 10-22-2006 05:23 AM
Attachments:
TIMED_LOOP_Cont Acq&Graph Voltage-Int Clk.vi ‏143 KB
WHILE_Cont Acq&Graph Voltage-Int Clk.vi ‏75 KB

hi molo511,
I tested your program but only with simulated devices. I had to delete the wire to the timing, so that the timed while loop runs with 1kHz. Did you already try this? Because this works on my PC.
I also found a link in our database that might be interesting for you.
http://digital.ni.com/public.nsf/websearch/04BEDD9E9E91ED3486256D180048116D?OpenDocument
Greets
Philipp N.
NI Application Engineer

While loop brings out of bounds error

I cannot see why this while loop is bring the out of bounds errror in my program please let me know how to correct it
thanx
import java.util.Scanner;
public class UniqueNumbers
 public int count3 = 0;
 public int count2 = 0;
 public int count = 0;
public int number = 0;
// public int ifnumber;
public int arrayBuild()
 int numbers[]; // declare array named array
 numbers = new int[ 5 ]; // create the space for array
Scanner input = new Scanner(System.in);
//System.out.println("Enter a number between 10 and 100.");
//int ifnumber = input.nextInt();
while (count3 <=numbers.length)
System.out.println("Enter a number between 10 and 100.");
int ifnumber = input.nextInt();
 if (ifnumber >= 10 || ifnumber <= 100)
 numbers[count] = ifnumber;
 count++;
 count3++;
if (ifnumber < 10 || ifnumber > 100)
System.out.println("Number is out of range.");
 continue;
//for(count2 = 0; count2 < numbers.length; count2++)
// if(numbers[count] != ifnumber)
// System.out.printf("%d\n",ifnumber);
}//end while loop
return numbers[count];
}//end arrayBuild
public void displayMessage()
 //display number inputted by user
 System.out.printf("The number you entered is: %d \n", getNumbers() );
}//end displayMessage
public int getNumbers( )
 number = arrayBuild();
 return number;
}//end getNumbers
}

Do this instead:
while (count3 <numbers.length)

Problem with DAQ in while loop and Graphs

Hello,
I'm new here so I apologize if I posted this on the wrong board
This is my "situation":
I need to make a simple PID controller which takes information (process variable) from an outside source (a NI's DAC connected through the USB port ) which is accomplished using NI-DAQ as an input, and the PID's output goes to the second NI-DAQ which is also connected using DAC to an actuator which in my case regulates the air pressure. (VI attached)
My problem is the following.
Both of the NI-DAQ I placed using DAQ Assist, require to be in a while loop.
-If I place them in separate loops, I have the problem of passing information between the Input NI-DAQ and the PID, and also between the PID and the Output NI-DAQ.
-If I place them both in one big loop, an error occurs saying that the selected buffer size is too small (Error -200609).
The timing settings for the DAQ's N samples, 100 samples to read at the rate of 1k (I also tried with Continuous samples and many different combinations of Samples to Read an Rate but without success).
Should I wire them with the same dt(s)?
The other thing I need to do (I'm also writing it here in order not to open new topics) is show the following 3 signals on a Graph (process variable (dynamic data type)(range 4mA - 20mA), PID output (double)(range 4mA - 20mA), and the Set Point (double)(range 0 to inf))
Firstly, is it possible to show the first two on a scale from 0 to 100 without changing the PID's output which needs to be 4-20?
Secondly, which graph should I use if I have different data types? (I tried the Waveform Chart, and succeeded in showing the first two; the third just messes everything up)
I would also have to make a legend explaining which signal is which (I see that this is possible with the Mixed Signal Graph).
I know this is probably too much to ask, but I'd be grateful for any help
Thank you in advance
Attachments:
PID while.vi ‏100 KB

My problem is the following. Both of the NI-DAQ I placed using DAQ Assist, require to be in a while loop.
-If
I place them in separate loops, I have the problem of passing
information between the Input NI-DAQ and the PID, and also between the
PID and the Output NI-DAQ.
This is the best option---Use QUEUE or Functional global or something else to tranfer the data to and fro
How do I make that QUEUE or Functional global?
-If I place them both in one big loop, an error occurs saying that the selected buffer size is too small (Error -200609).
Have
you tried increasing the buffer? Is the acquisition happening
parallelly (means to say the first DAQ not wired (error terminal) to
second DAQ)
Well the buffer is, at least how I understood it, the option Number of Samples when in Continuous Samples mode. Concerning the parallel acquisition, do you mean I should wire the error ports of both of the DAQs?

How can I write waveform data from a while loop?

Alright, I have a NI-5122 high speed digitizer that I need to acquire 10,000 waveforms. I am currently using the NI example code "niScope EX Multi Record Fetch More Than Available Memory.vi" to do this and then onto that later. I set the Number of Records to 10,000, min record length to 8192, and the min sample rate to 100M (S/s). On the Fetch vi, I set it to get a 1D Dbl array and then send it to the while loop edge for auto indexing. What I want is to take each waveform and write it to a file next to the previous waveform not append it to the bottom of the previous one. I can do 100 and sometimes 1000 waveforms with my current setup and then use "write measurement to file.vi" to save the data, but at 10,000 it says that the memory is full. I have 256 MB on the NI-5122 and 4G of memory on my host computer. My reasoning is that if the NI-5122 can hold all that data then why can't my host computer. I have tried to fetch using 2D Dbl and transpose that matrix and send the data to "write measurement to file.vi" inside the loop and append the data that way, but when I do this the card does not acquire any data. Which seems like a software problem. I know this is probabaly worded poorly, so just post a response if further explanation is needed.
Thank you.

Hello,
It sound like you might have received a LabVIEW: Memory is full message. Are you also graphing this data as it is being acquired? Are you building an array inside the loop? At the 100 MS/s rate, you are using a lot of memory to acquire, graph, build and transpose array data, and then write to file. If you are saving to file and do not necessary need to see the data, I would suggest taking the graphical indicator out of the code. Please review some of the KnowledgeBases linked below about the LabVIEW: Memory is full.
KB 36QD14V3: Why Do I Receive a "Memory is Full, VI Stopped at Loop Tunnel 0xXXXX" Error?
KB 3ZNDGRS9: LabVIEW "Memory is Full" Error
Samantha
National Instruments
Applications Engineer

Azure Webjobs with EF DB - A network-related or instance-specific error occurred while establishing a connection to SQL Server

Hi,
I have been trying to get a very simple WebJob developed and deployed onto Azure with little to no luck. I have a MVC Website which has a common project which handles my Data Access Layer with Entity Framework. I have created a WebJob project
using Visual Studio and added the following lines of code to the Manual Trigger Function
[NoAutomaticTrigger]
public static void ManualTrigger(TextWriter log, int value, [Queue("queue")] out string message)
RitualDBEntities db = new RitualDBEntities();
log.WriteLine("Function is invoked with value={0}", value);
List<Location> locations = db.Locations.ToList();
string msg = string.Empty;
foreach (Location location in locations)
msg += location.Name;
message = msg;
log.WriteLine("Following message will be written on the Queue={0}", message);
In my app.config of my WebJob i have the following connection strings:
<add name="RitualDBEntities" connectionString="metadata=res://*/RitualDBEntities.csdl|res://*/RitualDBEntities.ssdl|res://*/RitualDBEntities.msl;provider=System.Data.SqlClient;provider connection string="data source=ritual-pc\sqlexpress;initial catalog=RitualDB;integrated security=True;persist security info=False;MultipleActiveResultSets=True;App=EntityFramework"" providerName="System.Data.EntityClient" />
<add name="RitualContext" connectionString="Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=RitualDB;Data Source=ritual-pc\sqlexpress" providerName="System.Data.SqlClient" />
<add name="AzureWebJobsDashboard" connectionString="DefaultEndpointsProtocol=https;AccountName=ritual***;AccountKey=tQAP0gyMYKtWPJeIbsqk2iT2k69gyd1FwcyRf3+5Mc9b9EdYzpj0Dq8X2VHUmF*****"/>
<add name="AzureWebJobsStorage" connectionString="DefaultEndpointsProtocol=https;AccountName=ritual***;AccountKey=tQAP0gyMYKtWPJeIbsqk2iT2k69gyd1FwcyRf3+5Mc9b9EdYzpj0Dq8X2VHUmF*****" />
When i test locally (F5 Debugging) the webjob runs successfully and does the loop of the objects returned from the database. When i deploy this Azure the WebJob fails with the following error:
[03/29/2015 22:07:39 > 6ca05b: SYS INFO] Status changed to Initializing
[03/29/2015 22:07:41 > 6ca05b: SYS INFO] Run script 'Ritual.WebJobs.Members.exe' with script host - 'WindowsScriptHost'
[03/29/2015 22:07:41 > 6ca05b: SYS INFO] Status changed to Running
[03/29/2015 22:07:44 > 6ca05b: INFO] Found the following functions:
[03/29/2015 22:07:44 > 6ca05b: INFO] Ritual.WebJobs.Members.Functions.ManualTrigger
[03/29/2015 22:07:44 > 6ca05b: INFO] Executing: 'Functions.ManualTrigger' because This was function was programmatically called via the host APIs.
[03/29/2015 22:08:01 > 6ca05b: INFO] Function had errors. See Azure WebJobs SDK dashboard for details. Instance id is e99d7205-3ca0-4674-9414-f0381d5c2316
[03/29/2015 22:08:01 > 6ca05b: ERR ]
[03/29/2015 22:08:01 > 6ca05b: ERR ] Unhandled Exception: System.Data.Entity.Core.EntityException: The underlying provider failed on Open. ---> System.Data.SqlClient.SqlException: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, Boolean withFailover)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean ignoreSniOpenTimeout, TimeoutTimer timeout, Boolean withFailover)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString connectionOptions, SqlCredential credential, TimeoutTimer timeout)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(TimeoutTimer timeout, SqlConnectionString connectionOptions, SqlCredential credential, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString userConnectionOptions, SessionData reconnectSessionData)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnectionPool pool, DbConnection owningObject, DbConnectionOptions options, DbConnectionPoolKey poolKey, DbConnectionOptions userOptions)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.SqlClient.SqlConnection.Open()
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.Infrastructure.Interception.DbConnectionDispatcher.<Open>b__36(DbConnection t, DbConnectionInterceptionContext c)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.Infrastructure.Interception.InternalDispatcher`1.Dispatch[TTarget,TInterceptionContext](TTarget target, Action`2 operation, TInterceptionContext interceptionContext, Action`3 executing, Action`3 executed)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.Infrastructure.Interception.DbConnectionDispatcher.Open(DbConnection connection, DbInterceptionContext interceptionContext)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.Core.EntityClient.EntityConnection.<Open>b__2()
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.<>c__DisplayClass1.<Execute>b__0()
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute[TResult](Func`1 operation)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute(Action operation)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.Core.EntityClient.EntityConnection.Open()
[03/29/2015 22:08:01 > 6ca05b: ERR ] --- End of inner exception stack trace ---
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.Core.EntityClient.EntityConnection.Open()
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.Core.Objects.ObjectContext.EnsureConnection(Boolean shouldMonitorTransactions)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction[T](Func`1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.Core.Objects.ObjectQuery`1.<>c__DisplayClass7.<GetResults>b__5()
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute[TResult](Func`1 operation)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.Core.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.Core.Objects.ObjectQuery`1.<System.Collections.Generic.IEnumerable<T>.GetEnumerator>b__0()
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.Internal.LazyEnumerator`1.MoveNext()
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at Ritual.WebJobs.Members.Functions.ManualTrigger(TextWriter log, Int32 value, String& message)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at lambda_method(Closure , Object[] )
[03/29/2015 22:08:01 > 6ca05b: ERR ] at Microsoft.Azure.WebJobs.Host.Executors.VoidInvoker.InvokeAsync(Object[] arguments)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.<ExecuteWithWatchersAsync>d__23.MoveNext()
[03/29/2015 22:08:01 > 6ca05b: ERR ] --- End of stack trace from previous location where exception was thrown ---
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.<ExecuteWithOutputLogsAsync>d__1c.MoveNext()
[03/29/2015 22:08:01 > 6ca05b: ERR ] --- End of stack trace from previous location where exception was thrown ---
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.<ExecuteWithLogMessageAsync>d__c.MoveNext()
[03/29/2015 22:08:01 > 6ca05b: ERR ] --- End of stack trace from previous location where exception was thrown ---
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
[03/29/2015 22:08:01 > 6ca05b: ERR ] at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.<ExecuteWithLogMessageAsync>d__c.MoveNext()
[03/29/2015 22:08:01 > 6ca05b: ERR ] --- End of stack trace from previous location where exception was thrown ---
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.<TryExecuteAsync>d__1.MoveNext()
[03/29/2015 22:08:01 > 6ca05b: ERR ] --- End of stack trace from previous location where exception was thrown ---
[03/29/2015 22:08:01 > 6ca05b: ERR ] at Microsoft.Azure.WebJobs.Host.Executors.ExceptionDispatchInfoDelayedException.Throw()
[03/29/2015 22:08:01 > 6ca05b: ERR ] at Microsoft.Azure.WebJobs.JobHost.<CallAsyncCore>d__7.MoveNext()
[03/29/2015 22:08:01 > 6ca05b: ERR ] --- End of stack trace from previous location where exception was thrown ---
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at Microsoft.Azure.WebJobs.JobHost.Call(MethodInfo method, Object arguments)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at Ritual.WebJobs.Members.Program.Main()
[03/29/2015 22:08:01 > 6ca05b: SYS INFO] Status changed to Failed
[03/29/2015 22:08:01 > 6ca05b: SYS ERR ] Job failed due to exit code -532462766
If i remove any of my database code and use just the basic Stub code my webjob will run successfully so i know that my connection strings (outside of the DB ones) are correct. My MVC web application also runs perfectly using the same connection strings
in Azure so i also know that they have also been configured.
I am now lost and need some guidance, so if someone is able to assist me that would be much appreciated.
Thanks
Ritual.

Can you try to log the connection string you are using in both cases to make sure they are the same?
Also can you share your site name, either directly or indirectly?
This will help us investigate.
Thanks,
Amit

How can i get the while loop to enter a different loop beside the first one

I can't seem to figure out how to change the value to enter into one of the other while statements in the script. I am new to this and can't seem to find anything how to enter in the information to be able to go to different while statements and then run
what is located in that statement.
The script is supposed to let me choose between TC, MonsterLock, and Cyc and then jump to the while statement that is associated with one of them and then run what ever is located in that block. All i am getting is a infinite loop and it never sees the other
while loops. I have 3 set up the go along with the first statement but no matter what i type in for them it always looks at the first while statement and stays there.
Can someone please help me with having it do what i stated earlier.
write-host "This script sets up DATABASE Staging"
$ProductionDistro = Read-Host -Prompt "Which production do you `enter code here`want to run?(TC/MonsterLock/Cyc)"
While($ProductionDistro -notmatch "(TC|MonsterLock|Cyc)"){
write-host "You have entered an error" -ForegroundColor Red
write-host "You must type TC or MonsterLock or Cyc"
write-host "you typed $ProductionDistro"
write-host "This script sets up DATABASE Staging"
$ProductionDistro = Read-Host -Prompt "Which production do you `enter code here`want to run?(TC/MonsterLock/Cyc)"
while($ProductionDistro -match $TC) {
write-host "Sets up location you want to run staging"
$ElementDistro = Read-Host -Prompt "Which Element do you want to run? (DATABASE1/DATABASE2/DATABASE3/DATABASE4/ALL)"
While($ElementDistro -notmatch "(DATABASE1|DATABASE2|DATABASE3|DATABASE4|ALL)") {
write-host "you have enterd an error" -ForegroundColor Red
write-host "You must type DATABASE1 or DATABASE2 or DATABASE3 or DATABASE4 or ALL"
write-host "you typed $ElementDistro"
write-host "set location you want to run staging"
$ElementDistro = Read-Host -Prompt "Which Element do you want to run? (DATABASE1/DATABASE2/DATABASE3/DATABASE4/ALL)"
While($PrductionDistro -match $MonsterLock){
write-host "Sets up location you want to run staging"
$ElementDistro = Read-Host -Prompt "Which Element do you want to run? (DATABASE1/DATABASE2/DATABASE3/DATABASE4/ALL)"
While($ElementDistro -notmatch "(DATABASE1|DATABASE2|DATABASE3|DATABASE4|ALL)") {
write-host "you have enterd an error" -ForegroundColor Red
write-host "You must type DATABASE1 or DATABASE2 or DATABASE3 or DATABASE4 or ALL"
write-host "you typed $ElementDistro"
write-host "set location you want to run staging"
$ElementDistro = Read-Host -Prompt "Which Element do you want to run? (DATABASE1/DATABASE2/DATABASE3/DATABASE4/ALL)"
while( $ElementDistro -match $DATABASE1 ){
function Execute-MySqlcommand {param( [string]$Server, #the host of the SQL server
[string]$Database1, #the name of the database
[System.Data.MySqlclient.MySqlcommand]$Command) #the command to execute (name of stored command)
$mysqlConnection = new-object System.Data.MySqlclient.MySqlConnection
$MySqlConnection.ConnectionString = "DROP_VIEW DATABASE.BTXADDR;DROP_VIEW DATABASE.BTXSUPB;CREATE_VIEW DATABASE.BTXADDR FOR DATABASE1.DATABASE1S2.BTXADDR;CREATE_VIEW DATABASE.BTXSUPB FOR DATABASE1.DATABASE1S3.BTXSUPB"
$MySqlConnection.ConnectionString = "TRUNCATE TABLE DATABASE1.DATABASE1S2.BTXADDR;TRUNCATE TABLE DATABASE1.DATABASE1S3.BTXSUPB; INSERT INTO DATABASE1.DATABASE1S3.BTXSUPB SELECT * FROM DATABASE1.DATABASE1S2.BTXSUPB; select count(*) from DATABASE1.DATABASE.BTXADDR; select count(*) from DATABASE1S.DATABASE.BTXADDR; select count(*) from DATABASE1.DATABASE.BTXSURB; select count(*) from DATABASE1S.DATABASE.BTXSUPB;"
$Command.CommandType = 1 # 1 is the 'Text' command type
$Command.Connection = $mysqlConnection
$mysqlConnection.Open()
$Result = $Command.ExecuteNonQuery()
$mysqlConnection.Close()
if ($Result -gt 0) {return $True} else {return $False}
function Execute-MySQLCommand {param( [string]$Server, #the host name of the SQL server
[string]$DATABASE1, #the name of the database
[System.Data.SqlClient.SqlCommand]$Command) #the command to execute (name of stored procedure)
$sqlConnection = New-Object System.Data.SqlClient.SqlConnection
$sqlConnection.ConnectionString = "DATABASE_CONNECT_STRING=DSN=DATABASE1;Description=DATABASE1;Trusted_Connection=Yes;WSID=Server;DATABASE=DATABASE1;DATASET=DEFAULT"
$Command.CommandType = 1 # 1 is the 'Text' command type
$Command.Connection = $sqlConnection
$sqlConnection.Open()
$Result = $Command.ExecuteNonQuery()
$sqlConnection.Close()
if ($Result -gt 0) {return $TRUE} else {return $FALSE}
function Copy-File {
#.Synopsis
# Copies all files and folders in $source folder to $destination folder, but with .copy inserted before the extension if the file already exists
param}($DATABASE0980453.pkg,"d/DATABASE1/code_stg")
# create destination if it's not there ...
#mkdir $destination -force -erroraction SilentlyContinue
foreach($original in ls $source -recurse) {
$result = $original.FullName.Replace($source,$destination)
while(test-path $result -type leaf){ $result = [IO.Path]::ChangeExtension($result,"copy$([IO.Path]::GetExtension($result))") }
if($original.PSIsContainer) {
# mkdir $result -ErrorAction SilentlyContinue
# } else {
copy $original.FullName -destination $result
cd /d/DATABASE1/code_stg
install ../DATABASE0980453.pkg
while($ElementDistro -match $DATABASE2 ) {
function execute-MySqlcommand {param( [string]$Server, #the host of the SQL server
[string]$DataBase2, #the name of the database
[System.Data.MySqlclient.MySqlcommand]$Command) #the command to execute (name of stored command)
$mysqlConnection = new-object System.Data.MySqlclient.MySqlConnection
$MySqlConnection.ConnectionString = "DROP_VIEW DATABASE.BTXADDR;DROP_VIEW DATABASE.BTXSUPB;CREATE_VIEW DATABASE.BTXADDR FOR DATABASE2.DATABASE2MS2.BTXADDR;CREATE_VIEW DATABASE.BTXSUPB FOR DATABASE2.DATABASE2S3.BTXSUPB"
$MySqlConnection.ConnectionString = "TRUNCATE TABLE DATABASE2.DATABASE2S2.BTXADDR;TRUNCATE TABLE DATABASE2.DATABASE2S3.BTXSUPB; INSERT INTO DATABASE2.DATABASE2S3.BTXSUPB SELECT * FROM DATABASE2.DATABASE2S2.BTXSUPB; select count(*) from DATABASE2.DATABASE.BTXADDR; select count(*) from DATABASE2S.DATABASE.BTXADDR; select count(*) from DATABASE2.DATABASE.BTXSURB; select count(*) from DATABASE2S.DATABASE.BTXSUPB;"
$Command.CommandType = 1 # 1 is the 'Text' command type
$Command.Connection = $mysqlConnection
$mysqlConnection.Open()
$Result = $Command.ExecuteNonQuery()
$mysqlConnection.Close()
if ($Result -gt 0) {return $True} else {return $False}
function Execute-MySQLCommand {param( [string]$Server, #the host name of the SQL server
[string]$DATABASE2, #the name of the database
[System.Data.SqlClient.SqlCommand]$Command) #the command to execute (name of stored procedure)
$sqlConnection = New-Object System.Data.SqlClient.SqlConnection
$sqlConnection.ConnectionString = "DATABASE_CONNECT_STRING=DSN=DATABASE2; Description=DATABASE2; Trusted_Connection=Yes;WSID=Server;DATABASE=DATABASE2;"
$Command.CommandType = 1 # 1 is the 'Text' command type
$Command.Connection = $sqlConnection
$sqlConnection.Open()
$Result = $Command.ExecuteNonQuery()
$sqlConnection.Close()
if ($Result -gt 0) {return $TRUE} else {return $FALSE}
function Copy-File {
#.Synopsis
# Copies all files and folders in $source folder to $destination folder, but with .copy inserted before the extension if the file already exists
param}($DATABASE0980453.pkg,"d/DATABASE2/code_stg")
# create destination if it's not there ...
#mkdir $destination -force -erroraction SilentlyContinue
foreach($original in ls $source -recurse) {
$result = $original.FullName.Replace($source,$destination)
while(test-path $result -type leaf){ $result = [IO.Path]::ChangeExtension($result,"copy$([IO.Path]::GetExtension($result))") }
if($original.PSIsContainer) {
# mkdir $result -ErrorAction SilentlyContinue
# } else {
copy $original.FullName -destination $result
cd /d/DATABASE2/code_stg
install ../DATABASE0980453.pkg
While( $ElementDistro -match $DATABASE3 ) {
function Execute-MySqlcommand {param( [string]$Server, #the host of the SQL server
[string]$DATABASE3, #the name of the database
[System.Data.MySqlclient.MySqlcommand]$Command) #the command to execute (name of stored command)
$mysqlConnection = new-object System.Data.MySqlclient.MySqlConnection
$MySqlConnection.ConnectionString = "DROP_VIEW DATABASE.BTXADDR;DROP_VIEW DATABASE.BTXSUPB;CREATE_VIEW DATABASE.BTXADDR FOR DATABASE3.DATABASE3S2.BTXADDR;CREATE_VIEW DATABASE.BTXSUPB FOR DATABASE3.DATABASE3S3.BTXSUPB"
$MySqlConnection.ConnectionString = "TRUNCATE TABLE DATABASE3.DATABASE3S2.BTXADDR;TRUNCATE TABLE DATABASE3.DATABASE3S3.BTXSUPB; INSERT INTO DATABASE3.DATABASE3S3.BTXSUPB SELECT * FROM DATABASE3.DATABASE3S2.BTXSUPB; select count(*) from DATABASE3.DATABASE.BTXADDR; select count(*) from DATABASE3S.DATABASE.BTXADDR; select count(*) from DATABASE3.DATABASE.BTXSURB; select count(*) from DATABASE3S.DATABASE.BTXSUPB;"
$Command.CommandType = 1 # 1 is the 'Text' command type
$Command.Connection = $mysqlConnection
$mysqlConnection.Open()
$Result = $Command.ExecuteNonQuery()
$mysqlConnection.Close()
if ($Result -gt 0) {return $True} else {return $False}
function Execute-MySQLCommand {param( [string]$Server, #the host name of the SQL server
[string]$DATABASE3, #the name of the database
[System.Data.SqlClient.SqlCommand]$Command) #the command to execute (name of stored procedure)
$sqlConnection = New-Object System.Data.SqlClient.SqlConnection
$sqlConnection.ConnectionString = "DATABASE_CONNECT_STRING=DSN=DATABASE3;Description=DATABASE3;Trusted_Connection=Yes;WSID=Server;DATABASE=DATABASE3;"
$Command.CommandType = 1 # 1 is the 'Text' command type
$Command.Connection = $sqlConnection
$sqlConnection.Open()
$Result = $Command.ExecuteNonQuery()
$sqlConnection.Close()
if ($Result -gt 0) {return $TRUE} else {return $FALSE}
cd /d/DATABASE3/code_stg
install ../DATABASE0980453.pkg
function Copy-File {
#.Synopsis
# Copies all files and folders in $source folder to $destination folder, but with .copy inserted before the extension if the file already exists
param}($DATABASE0980453.pkg,"d/DATABASE3/code_stg")
# create destination if it's not there ...
#mkdir $destination -force -erroraction SilentlyContinue
foreach($original in ls $source -recurse) {
$result = $original.FullName.Replace($source,$destination)
while(test-path $result -type leaf){ $result = [IO.Path]::ChangeExtension($result,"copy$([IO.Path]::GetExtension($result))") }
if($original.PSIsContainer) {
# mkdir $result -ErrorAction SilentlyContinue
# } else {
copy $original.FullName -destination $result
While($ElementDistro -match $DATABASE4 ) {
function Execute-MySqlcommand {param( [string]$Server, #the host of the SQL server
[string]$DATABASE4, #the name of the database
[System.Data.MySqlclient.MySqlcommand]$Command) #the command to execute (name of stored command)
$mysqlConnection = new-object System.Data.MySqlclient.MySqlConnection
$MySqlConnection.ConnectionString = "DROP_VIEW DATABASE.BTXADDR;DROP_VIEW DATABASE.BTXSUPB;CREATE_VIEW DATABASE.BTXADDR FOR DATABASE4.DATABASE42.BTXADDR;CREATE_VIEW DATABASE.BTXSUPB FOR DATABASE4.DATABASE4S3.BTXSUPB"
$MySqlConnection.ConnectionString = "TRUNCATE TABLE DATABASE4.DATABASE4S2.BTXADDR;TRUNCATE TABLE DATABASE4.DATABASE4S3.BTXSUPB; INSERT INTO DATABASE4.DATABASE4S3.BTXSUPB SELECT * FROM DATABASE4.DATABASE4S2.BTXSUPB; select count(*) from DATABASE4.DATABASE.BTXADDR; select count(*) from DATABASE4S.DATABASE.BTXADDR; select count(*) from DATABASE4.DATABASE.BTXSURB; select count(*) from DATABASE4S.DATABASE.BTXSUPB;"
$Command.CommandType = 1 # 1 is the 'Text' command type
$Command.Connection = $mysqlConnection
$mysqlConnection.Open()
$Result = $Command.ExecuteNonQuery()
$mysqlConnection.Close()
if ($Result -gt 0) {return $True} else {return $False}
function Execute-MySQLCommand {param( [string]$Server, #the host name of the SQL server
[string]$DATABASE4, #the name of the database
[System.Data.SqlClient.SqlCommand]$Command) #the command to execute (name of stored procedure)
$sqlConnection = New-Object System.Data.SqlClient.SqlConnection
$sqlConnection.ConnectionString = "DATABASE_CONNECT_STRING=DSN=DATABASE4;Description=DATABASE4;Trusted_Connection=Yes;WSID=Server;DATABASE=TF90PVS;"
$Command.CommandType = 1 # 1 is the 'Text' command type
$Command.Connection = $sqlConnection
$sqlConnection.Open()
$Result = $Command.ExecuteNonQuery()
$sqlConnection.Close()
if ($Result -gt 0) {return $TRUE} else {return $FALSE}
function Copy-File {
#.Synopsis
# Copies all files and folders in $source folder to $destination folder, but with .copy inserted before the extension if the file already exists
param}($DATABASE0980453.pkg,,"d/DATABASE4/code_stg")
# create destination if it's not there ...
#mkdir $destination -force -erroraction SilentlyContinue
foreach($original in ls $source -recurse) {
$result = $original.FullName.Replace($source,$destination)
while(test-path $result -type leaf){ $result = [IO.Path]::ChangeExtension($result,"copy$([IO.Path]::GetExtension($result))") }
if($original.PSIsContainer) {
# mkdir $result -ErrorAction SilentlyContinue
# } else {
copy $original.FullName -destination $result
cd /d/DATABASE4/code_st
install ../DATABASE0980453.pkg
While($ElementDistro -match $ALL ){
function Execute-MySQLCommand {param( [string]$Server, #the host name of the SQL server
[string]$DATABASE1,$DATABASE2,$DATABASE3,$DATABASE4, #the name of the database
[System.Data.SqlClient.SqlCommand]$Command) #the command to execute (name of stored procedure)
$sqlConnection = New-Object System.Data.SqlClient.SqlConnection
$sqlConnection.ConnectionString = "(DATABASE_CONNECT_STRING=DSN=DATABASE1;Description=DATABASE1;Trusted_Connection=Yes;WSID=Server;DATABASE=DATABASE1;DATASET=DEFAULT;),(DATABASE_CONNECT_STRING=DSN=DATABASE2; Description=DATABASE2; Trusted_Connection=Yes;WSID=Server;DATABASE=DATABASE2;),(DATABASE_CONNECT_STRING=DSN=DATABASE3;Description=DATABASE3;Trusted_Connection=Yes;WSID=Server;DATABASE=DATABASE3;),(DATABASE_CONNECT_STRING=DSN=DATABASE4;Description=DATABASE4;Trusted_Connection=Yes;WSID=Server;DATABASE=TF90PVS;)"
$Command.CommandType = 1 # 1 is the 'Text' command type
$Command.Connection = $sqlConnection
$sqlConnection.Open()
$Result = $Command.ExecuteNonQuery()
$sqlConnection.Close()
if ($Result -gt 0) {return $TRUE} else {return $FALSE}
install ../DATABASE0980453.pkg
While($ProductionDistro -match $Cyc) {
write-host "Sets up location you want to run staging"
$ElementDistro = Read-Host -Prompt "Which Element do you want to run? (DATABASE1/DATABASE2/DATABASE3/DATABASE4/ALL)"
While($ElementDistro -notmatch "(DATABASE1|DATABASE2|DATABASE3|DATABASE4|ALL)") {
write-host "you have enterd an error" -ForgroundColor Red
write-host "You must type DATABASE1 or DATABASE2 or DATABASE3 or DATABASE4 or ALL"
write-host "you typed $ElementDistro"
write-host "set location you want to run staging"
$ElementDistro = Read-Host -Prompt "Which Element do you want to run? (DATABASE1/DATABASE2/DATABASE3/DATABASE4/ALL)"

OK, so you've got a reasonable input loop early on:
write-host "This script sets up DATABASE Staging"
$ProductionDistro = Read-Host -Prompt "Which production do you `enter code here`want to run?(TC/MonsterLock/Cyc)"
While($ProductionDistro -notmatch "^(TC|MonsterLock|Cyc)$"){
write-host "You have entered an error" -ForegroundColor Red
write-host "You must type TC or MonsterLock or Cyc"
write-host "you typed $ProductionDistro"
write-host "This script sets up DATABASE Staging"
$ProductionDistro = Read-Host -Prompt "Which production do you `enter code here`want to run?(TC/MonsterLock/Cyc)"
I've only added two things to that code: a ^ and $ at the beginning and end of your regex pattern. As originally written, it would have successfully matched any string containing TC, MonsterLock or Cyc (such as "bogusTCwhatever", etc).
Now, instead of a bunch of extra While loops based on $ProductionDistro, what you need is some conditionals (either a Switch statement, or some If/ElseIf). For example:
switch ($ProductionDistro)
'TC'
# Do TC Stuff
break
'MonsterLock'
# Do MonsterLock Stuff
break
'Cyc'
# Do Cyc stuff
break

How to use while loops to implement a simple climate control.

Hi,
I am currently a 4’th year computer systems engineering student in South Africa doing a primitive climate control project in LabVIEW 8.0. Although my knowledge and skill level of LabVIEW is far from that of an expert, I really enjoy working with it. The project consists of a motor driving some fan blades, a resistor heater and an analog temperature sensor. The basic functionality entails that a user specifies a desired temperature and then the program will heat if the current temperature is lower than desired or cool if the current temperature is above the desired temperature.
What I want to add is an acceptable temperature difference so that the fan and heater do not switch constantly as the threshold temperature is reached. Rather leave the current temperature to linger between the maximum (current + acceptable difference) or minimum (current – acceptable difference) allowed temperature before heating or cooling it to the desired temperature once again.
I have attached 2 VI’s:
Final Assignment: I tried to achieve the sensible climate control by making use of a formula node. As soon as I substituted the if statements in the formula node with while statements, the VI did not respond. It did not give any errors, it just didn’t respond.
Final Assignment2: I tried the same but by making use of while loop structures. The while where my Input DAQ is works fine, but none of the other while loops work.
Please advise me on possible solutions for my problem/project.
Thank you in advance.
D. Weppenaar
Attachments:
Final Assignment1.vi ‏254 KB
Final Assignment21.vi ‏256 KB

1. Your VI does not respond because your formula node is trapped in an infinite loop and cannot exit if you're out of the deadband. Replace the words "while" with "if" (or similar) and you might be getting somewhere. Sorry, I don't have DAQ installed, but what determines the loop rate?
2. You have a dataflow issue. Only the inner loop on the left will run. All other loops must wait because they depend on data from the first loop. data is only available at an output tunnel of a loop once the loop finishes and a loop cannot start until all input tunnels contain data. Also the first loop can never stop, because the stop button is outside the loop and will never get read once the inner loop starts. The stop button needs to be in the innermost loop.
Most likely, all code segments should run synchronized, so delete all the inner loops. They serve no purpose. All yon need is the big outer loop as in the first code.
There are many ways to directly observe what is going on. For example you could run the VI in execution highlighting mode while watching the diagram.
Clearly, you need to become more familiar with LabVIEW basics. Maybe do a tutorial? Right now you might think that dataflow is a hindrance while in fact it is one of the most powerful advantages of dataflow programming. You simply need to be familiar with its logic.
LabVIEW Champion . Do more with less code and in less time .

How to code a parallel 'for loop' and 'while loop' where the while loop cannot terminate until the for loop has finished?? (queues also present)

I've attached a sample VI that I just cannot figure out how to get working the way that I want. I've labeled the some sections with black-on-yellow text boxes for clarity during the description that follows in the next few sentences. Here's what I want:
1) overall -- i'm intend for this to be a subVI that will do data acquisition and write the data to a file. I want it to use a producer/consumer approach. The producer construct is the 'parallel for loop' that runs an exact number of times depending on user input (which will come from the mainVI that is not included). For now I've wired a 1-D array w/ 2 elements as a test case. During the producer loop, the data is acquired and put into a queue to be delt with in the consumer loop (for now, i just add a random number to the queue).
2) the consumer construct is the 'parallel while loop'. It will dequeue elements and write them to a file. I want this to keep running continuously and parallel until two conditions are met.
      i. the for loop has finished execution
      ii. the queue is empty.
   when the conditions are met, the while loop will exit, close the queue, and the subVI will finish. (and return stuff to mainVI that i can deal with on my own)
Here's the problems.
1) in the "parallel for loop" I have a flat sequence structure.. I haven't had time to incorporate some data dependency into these two sequential sections, but basically, I just care that the "inner while loop" condition is met before the data is collected and queued. I think I can do this on my own, but if you have suggestions, I'm interested.
2) I can easily get the outer for and while loops to run sequentially, but I want them to run in parallel. My reasoning for this is that that I anticipate the two tasks taking very different amounts of time. .. basically, I want the while loop to just keep polling the queue to get everything out of it (or I suppose I could somehow use notifiers - suggestions welcome)... the thing is, this loop will probably run faster than the for loop, so just checking to see that the queue is empty will not work... I need to meet the additional condition that nothing else will be placed in the queue - and this condition is met when the for loop is complete. basically, I just can't figure out how to do this.
3) for now, I've placed a simple stop button in the 'parallel while loop', but I must be missing something fundamental here, because the stop button is totally unresponsive. i.e. - when I press it, it stays depressed, and nothing happens.
suggestions are totally welcome!
thanks,
-Z
Attachments:
daq01v1.vi ‏59 KB

I'd actually like to add a little more, since I thought about it a bit and I'm still not quite certain I understand the sequence of events...
altenbach wrote:
zskillz wrote:
So i read a bit more about the 'dequeue element' function, and as I understand it, since there is no timeout wired to the dequeue element function, it will wait forever, thus the race condition I suggested above can never happen!
Yes, you got it!
As I've thought about it a bit more, there's a few things that surprise me... first, the reason the 'dequeue element while loop' errors is not because there's nothing in the queue, it's becaues the queue has been released and it's trying to access that released queue... However the problem I have is this --- Even though there's no timeout wired to the dequeue element, I still would think that the while loop that contains it would continue to run at whatever pace it wanted -- and as i said before.. most of the time, it would find that there is nothing to dequeue, but once in a while, something is there. however, it seems that this loop only runs when something has been enqueued. the reason I say this is illustrated in the next code sample MODv2 that's attached below. I've added a stop button to the "queue size while loop" so the program runs until that is pressed. I've also added a simple conditional in the "dequeue while loop" that generates a random number if it a button is pressed... but this button is totally non-responsive... which means to me that the "dequeue while loop" isn't actually continuously running, but only when an element is added to the queue. this still seems almost like the 'dequeue while loop" waits for a notifier from the queue telling it to run. can you explain this to me? because it is different from what I expect to be happening.
rasputin wrote:
I tried to open your VIs but it doesn't work. LV
is launched, the dialog box (new, open, configure...) opens and then...
nothing. Not even an error message. I guess it isn't a problem of LV
version or a dialog box would appear saying this. Could you, please,
send a image of the code?
Thanks,
Hi Rasputin, I'm using LV8. I assume that was your problem, but who knows. I've attached a pic of of altenbach's solution since it's what I needed.
thanks
-Z
Message Edited by zskillz on 10-20-2006 11:49 AM
Attachments:
daq01v1MODv2.vi ‏63 KB
daq01v1MODpic.JPG ‏116 KB

AI Read is executing only once in a while loop instead of continuously scanning the channels

The ultimate goal is to sample 15 channels (1 at 20kHz, 9 at 1000Hz, and 5 at 100Hz). Since only one scan rate is possible, I would like to reduce the data (for both displaying and saving purposes). The decimate function does not seem to work correctly.
Attached is the current subroutine used to 'decimate' the data. It seems to work on the first loop iteration, as seen by the data block with correct time stamps and data values, but with each additional iteration, all values are zero. Why is only one scan being used in the displaying of data?
Attachments:
Acquire_N_ScansNM4.llb ‏76 KB

When you call AI Clear, the DAQ session is over. You will not get any new data by calling AI Read after an AI Clear. Move your AI Clear to the right of your while loop such that it runs after the while loop completes. Don't forget to wire an error cluster or DAQ session ID to AI Clear from inside the while loop to create the data dependency. Also, consider adding a shift register for the error cluster and some way to exit the loop on an error.
Remember that Alliance Members are here to help. We do this stuff every day.
Daniel L. Press
PrimeTest Corp.
www.primetest.com

Problem with while loop in thread: starting an audiostream

Hello guys,
I'm doing this project for school and I'm trying to make a simple app that plays a number of samples and forms a beat, baed on which buttons on the screen are pressed, think like fruity loops. But perhaps a screenshot of my unfnished GUI makes things a bit more clear:
[http://www.speedyshare.com/794260193.html]
Anyway, on pressing the play button, I start building an arraylist with all the selected samples and start playing them. Once the end of the "screen" is reached it should start playing again, this is the while loop:
public void run(){
 //System.out.println("Wavfiles.size =" + getWavfiles().size());
 System.out.println(repeatperiod);
 if (getWavfiles() == null) {
 System.out.println("Error: list of Wavfiles is empty, cannot start playing.");
 else{
 if(!active) return;
 while(active){
 System.out.println("Wavfiles.size =" + getWavfiles().size());
 for (int i=0; i<getWavfiles().size(); i++){
 Wavplayer filePlayer = new Wavplayer(getWavfiles().get(i).getStream());
 Timer timer = new Timer();
 //timer.scheduleAtFixedRate(filePlayer, getWavfiles().get(i).getStartTime(),repeatperiod);
 timer.schedule(filePlayer, getWavfiles().get(i).getStartTime());
 try {
 Thread.sleep(repeatperiod);
 } catch (InterruptedException ex) {
 Logger.getLogger(LineBuilder.class.getName()).log(Level.SEVERE, null, ex);
 }But once the second iteration should begin, I'm getting nullpointerexceptions. These nullpointerexceptions come exactly when the second period starts so I suppose the sleep works :-) The nullpointerexception comes from the wavfile I try to play. Wavfile class:
package BeatMixer.audio;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.TimerTask;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.SourceDataLine;
import javax.sound.sampled.UnsupportedAudioFileException;
public class Wavplayer extends TimerTask {
 private SourceDataLine auline;
 private AudioInputStream audioInputStream;
 private final int EXTERNAL_BUFFER_SIZE = 524288; // 128Kb
 public Wavplayer(ByteArrayInputStream wavstream) {
 try {
 audioInputStream = AudioSystem.getAudioInputStream(wavstream);
 } catch (UnsupportedAudioFileException e1) {
 e1.printStackTrace();
 return;
 } catch (IOException e1) {
 e1.printStackTrace();
 return;
 AudioFormat format = audioInputStream.getFormat();
 DataLine.Info info = new DataLine.Info(SourceDataLine.class, format);
 try {
 auline = (SourceDataLine) AudioSystem.getLine(info);
 auline.open(format);
 } catch (LineUnavailableException e) {
 e.printStackTrace();
 return;
 } catch (Exception e) {
 e.printStackTrace();
 return;
 @Override
 public void run() {
 System.out.println(auline);
 auline.start();
 int nBytesRead = 0;
 byte[] abData = new byte[EXTERNAL_BUFFER_SIZE];
 try {
 while (nBytesRead != -1) {
 nBytesRead = audioInputStream.read(abData, 0, abData.length);
 if (nBytesRead >= 0)
 auline.write(abData, 0, nBytesRead);
 } catch (IOException e) {
 e.printStackTrace();
 return;
 } finally {
 auline.drain();
 auline.close();
}auline is null on second iteration, in fact, getAudioInputStream doesn't really work anymore, and I don't know why because I don't change anything about my list of wavfiles as far as I know... Any thoughts or extra info needed?
Edited by: Lorre on May 26, 2008 12:22 PM

Is my question not clear enough? Do you need more info? Or is nobody here familiar with javax.sound.sampled?
Edited by: Lorre on May 26, 2008 2:07 PM

Error in While loop

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