Convert an U8 array to a LabView data type

In my code the input is an fixed length of U8 array reflecting data in memory, I need to convert it to a predefined data type. For example, the first 2 U8 elements in the arrary need to comvert to an U16 data, next 4 U8 elements to U32 data. I am just wondering if there is any easy way to do that kind of conversion.
Solved!
Go to Solution.

In the first case use the Join Numbers function to join the bytes. In the second case, use the Join Numbers function three times: twice to join the consecutive bytes and once more to join the words into a single long word.
Mike...
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First of all, you should be sure that there is such a data type within the variant; otherwise, you will run into errors.
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SSIS Package : While Extracting Sharepoint Lookup column, getting error 'Cannnot convert between unicode and non-unicode string data types'

Hello,
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You have a data conversion transformation. Now, in the destination are you assigning the results of the derived column transformation or the data conversion transformation. To avoid this error you need use the data conversion output.
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Column "A" cannot convert between unicode and non-unicode string data types

I am following the SSIS overview video-
https://secure.cbtnuggets.com/it-training-videos/series/microsoft-sql-server-2008-business-development/6143?autostart=true
I have a flat file that i want to import the contents onto a SQL database.
I created a Dataflow task, source file and oledb destination.
I am getting the folliwung error -
"column "A" cannot convert between unicode and non-unicode string data types"
in the origin file the data type is coming as string[DT_STR] and in the destination object it is coming as "Unicode string [DT_WSTR]"
I used a data conversion object in between, dosent works very well
Please help what to do

I see this often.
Right Click on FlatFileSource --> Show Advanced Editor --> 'Input and Output Properties' tab --> Expand 'Flat File Source Output' --> Expand 'Output Columns' --> Select your field and set the datatype to DT_WSTR.
Let me know if you still have issues.
Thank You,
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Cannot convert between unicode and non-unicode string data types.

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I was getting same error while tranfering data from SQL 2005 to Excel , but using following method i was able to tranfer data. Hopefully it may also help you.
1) Using Data Conversion transformation
data types you need to select is DT_WSTR (unicode in terms of SQL: 2005)
2) derived coloumn transformation
expression you need to use is :
(DT_WSTR, 20) (note : 20 can be replace by your character size)
Note:
Above teo method create replica of your esting coloumn (default name will be copy of <coloumn name>).
while mapping data do not map actual coloumn to the destination but select the coloumn that were created by any of above data transformer (replicated coloumn).

How to fix "cannot convert between unicode and non-unicode string data types" :/

Environment: SQL Server 2008 R2
Introduction:Staging_table is a table where data is being stored from source file. Individual and ind_subject_scores are destination tables.
Purpose: To load the data from a source file .csv while SSIS define table fields with 50 varchar, I can still transfer the data to the entity table/ destination and keeping the table definition.
I'm getting validation error "Cannot convert between a unicode and a non-unicode string data types" for all the columns.
Please help

Hi ,
NVARCHAR = DT_WSTR
VARCHAR = DT_STR
Try below links:
http://social.msdn.microsoft.com/Forums/sqlserver/en-US/ed1caf36-7a62-44c8-9b67-127cb4a7b747/error-on-package-can-not-convert-from-unicode-to-non-unicode-string-type?forum=sqlintegrationservices
http://social.msdn.microsoft.com/Forums/en-US/eb0d1519-4be3-427d-bd30-ae4004ea9e8d/data-conversion-error-how-to-fix-this
http://technet.microsoft.com/en-us/library/aa337316(v=sql.105).aspx
http://social.technet.microsoft.com/wiki/contents/articles/19612.ssis-import-excel-to-table-cannot-convert-between-unicode-and-non-unicode-string-data-types.aspx
sathya - www.allaboutmssql.com ** Mark as answered if my post solved your problem and Vote as helpful if my post was useful **.

The suitable LabVIEW data type correspinding to the array of structure in Visual Basic ActiveX DLL

Hi!
I need to call a VB ActiveX DLL from LabVIEW. When I run my LabVIEW code, I always meet an error as:
Error 1 occurred at Incorrect Function in T06.vi
Possible reasons:
LabVIEW: An input parameter is invalid.
I have read the VB DLL code that defines the data type. It fills data to a structure, then puts this structure to the array, and sends the array of structures to the method.
VB Code:
For I = 1 To 31
Set MyInputData(I) = New EM_nkd_DataPoint
Next I
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.DataPointType = R_HW
.DataSource = MEASURED
.Wav
elength = 409.56
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~~~
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Attached my LabVIEW code for reference.
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TX
Attachments:
T07.vi ‏166 KB

Hi,
if you have a complete source code including EM_nkd_DataPoint class module, take a look inside in order to see data types for Amplitude, DataPointType, DataSource and Wavelength (probably for Amplitude and Wavelength is SINGLE). If this code is not available, maybe the author mentioned a type for T_SUB and MEASURED even if they are constants.

Error when Converts rows to columns dynamically in clob data type

Hi
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MAX (DECODE (NAME, 'A', VALUE1, NULL)) AS A,
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MAX (DECODE (NAME, 'C, VALUE1, NULL)) AS C,
MAX (DECODE (NAME, 'D', VALUE1, NULL)) AS D
FROM ( SELECT NO,
RTRIM (
XMLAGG (XMLELEMENT (E, VALUE || ',')).EXTRACT ('//text()').
GETCLOBVAL (),
VALUE1,
NAME
FROM DA
while i am execute for varchar type its as i expected. when i tried with clob data type i am getting follwoing error.
ORA-00932: inconsistent datatypes: expected - got CLOB
can any one pleas me?
thanks
Nagarajan.V

Nagarajan Venu wrote:
Thanks for your reply
This is scenario.
This is my table
NO--name--value
1--A--ASDF
2--B--IOP
all columns are clob type and i want the output like below.
No--A
1--ASDF
2--IOP
i just want to convert all rows to coulmns(clob type) dynamically.I don't get how you got that output from the data? What happened to "B"?
Please post a suitable example and expected output using create table and insert statements as well as giving your database version and using {noformat}{noformat} tags as detailed in the FAQ: {message:id=9360002}

Column cannot convert between unicode and non-unicode string data types

I am converting SSIS jobs from SQL Server 2005 running on a Windows 2003 server to 2008R2 running on a Windows 2008 server.  I have a dataflow with an OLE DB Source which is selecting from an Oracle view.  This of course worked fine in
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SELECT SOME_VIEW.UWI AS UWI,
CAST(SOME_VIEW.OIL_NET AS NUMERIC(9,8)) AS OIL_NET
FROM SOME_SCHEMA.SOME_VIEW
WHERE OIL_NET IS NOT NULL AND UWI IS NOT NULL
ORDER BY UWI
When I do "Show Advanced Editor" on this component, in the Input and Output Properties, I show the OLE DB External Column as DT_STR length 40 for the UWI column and for the Output Columns I see the UWI as the same DT_STR.
How can I get past this? I have tried doing a cast...cast(SOME_VIEW.UWI AS VARCHAR(40)) AS UWI and this gives the same error. The column in Oracle is a varchar2(40).
Any help is greatly appreciated. Thanks.

Please check the data type for UWI using advanced editor for Oledb Source under
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If not, try changing the data type (underoutput columns) same as data type shown under
external columns
Nitesh Rai- Please mark the post as answered if it answers your question

Labview data type to microcontroller

Hi,
I want to send data from labview to a PIC 16F876A, my question is can I only write values from 0 to 255 or I can send bigger values (like 5000) that the PIC could read the same value.
Thanks.

Hi Syd, if you want to write ascii characters, just send the character as a string to the microcontroller. In your VI you have chosen the default configurations for the serial port, are they really your chosen configurations? Here is the same VI with the options selectable. You should check out the serial examples shipped out with labview to work with the Read, Write and Configure serial Port VISAs. The help is also useful. If you get stuck just let us know.
PS: Which version of labview are you using?
LabVIEW 8.2,8.6,2009...still learning
Attachments:
Serial writing-3.vi ‏14 KB

Error Message while adding Item in Item Master Data- [Microsoft][SQL Server Native Client 10.0][SQL Server]Conversion failed when converting the nvarchar value 's008 01' to data type int. (CINF)

Dear Experts
I am getting the following error message while adding item in Item Master data. I have modified the following SBO_SP_transactionNotification in SQL server after that could not able to add the item
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@object_type nvarchar(20),                      -- SBO Object Type
@transaction_type nchar(1),               -- [A]dd, [U]pdate, [D]elete, [C]ancel, C[L]ose
@num_of_cols_in_key int,
@list_of_key_cols_tab_del nvarchar(255),
@list_of_cols_val_tab_del nvarchar(255)
AS
begin
-- Return values
declare @error int                       -- Result (0 for no error)
declare @error_message nvarchar (200)           -- Error string to be displayed
select @error = 0
select @error_message = N'Ok'
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BEGIN
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   BEGIN
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END
end
-- Select the return values
select @error, @error_message
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Hi Rathna,
Just put the SP like this, without the -- before the IF. A -- marks the line as a command therefore you need to uncomment and it will work.
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BEGIN
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END
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I think that if I could put LV data into OLE variant shape I may find an answer and solution to this matter.
Thank you
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UdeC - Chile

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However, handling OLE Variants in LabVIEW is automatic. LabVIEW itself has a variant datatype. When you use the ActiveX property or invoke nodes and one of the parameters is an OLE Variant, it is automatically converted to a LV Variant. You can then use the LV Variant VIs (such as "Variant to Data" and "To Variant").
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http://detritus.blogs.com/lycangeek

Improving the LabVIEW Help: Working with Data Types

Have you ever had trouble figuring out how to work with the waveform data type, the dynamic data type, or some of the other more complex data types in LabVIEW? As a tech writer on the LabVIEW team, I'd like to improve our documentation about working with data. What would you like to see? What would be helpful? Have you ever given up on a particular data type because it didn't work? Have you ever created a replacement data type because you preferred not to use a LabVIEW data type?
Lacy Klosterman Rohre | Marketing Editor | National Instruments | 512.683.6376 | ni.com/newsletter

I've been programming LabVIEW since around 3.1 / 4.0. Over the years and versions, I've found it necessary to approach a lot of the new datatypes and algorithms with some healthy skepticism because I don't think we're usually given a "fair and balanced" overview. Some of the things that are highly promoted that bring "ease of use" for beginners (and I *do* understand the importance of that when you're growing your LabVIEW user base) can carry significant performance penalties that are mentioned in more of a whisper, if at all. I'd just like a more full disclosure of the tradeoffs -- the good, the bad, and the ugly.
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Dynamic signals -- have never used them. Have no clear idea what good they're supposed to be, and they seem to be tied in primarily with Express VI's, which I have also studiously avoided.
Variants -- Use them only slightly. Performance issues are a question mark. Exception: have learned that the implementation of Variant properties allows their use as an efficient way to create associates for string lookup tables.
Digital Waveform -- have typically avoided it except when graphing digital data during debug. Haven't found any compelling reasons to use it. I do like the notion of a compress/expand capability for sparse digital data, but haven't exercised it enough to trust the implementation.
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Generate LabVIEW data from JSON

Hello,
I have a question about using the "Unflatten from JSON" function in LabVIEW. I have a JSON string data coming from an external application (Java) and I need to convert that to LabVIEW data type (a cluster) and use that information in my program. But the "Unflatten from JSON" function needs a data type to conver the JSON string to LabVIEW data. If I don't know about the data type, is there a way to create a LabVIEW data cluster from the incoming JSON string? Anybody has any experience on this?
I appreciate all your inputs.
Thanks...

Try the JSON LabVIEW library.

Arrays of Different Data Types

Hi, I am studing Java Development as 2 of my units (Programming Theory and Programming Practice), and I have a problem with a program which involves an array that contains two data types; int and long. The program is designed to store Student ID's and Exam Marks (1 Exam Mark per ID). The program is designed to use sorting, and the array is to be populated at the start of program execution. It compiles fine, but I get an error when the program is running as soon as you input the first value. The program is not very complex, but I need to understand how to get this fixed and why is isn't already. Any help is appreciated as this is a genuine problem. This program follows a consistent style template given to me by my tutor. The source is given below, and I appreciate any positive response.
Thanks in advance...
Aaron
     Name: Aaron Allport ([email protected])
     Assignment Number: 7
     Program Title/Topic: Student Marks/ID's with use of Array's
     Program Description: Using arrays and search/sort methods,
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                              data to be manipulated.
     Course Title/Unit: BTEC National in Computing
import javax.swing.JOptionPane;
class StudentRecord
     int mark;
     long sID;
public class Assignment7
     public static void main(String args[])
          final int numOfStudents = 11;
          String highestMark;
          String lowestMark;
          String examMark;
          long studentID = 00000000;
          String menuChoice;
          StudentRecord module[] = new StudentRecord[numOfStudents];
          inputRecords(module, numOfStudents);
          do
          menuChoice = JOptionPane.showInputDialog(null,
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               "1. Find student with highest mark\n" +
               "2. Find student with lowest mark\n" +
               "3. Find grade for a given student\n" +
               "4. Sort records by Student ID\n" +
               "5. Sort records by Student Mark\n" +
               "6. Display all records");
                    if (menuChoice.equals("1"))
                         highestMark = findHighest(module, numOfStudents);
                    else if (menuChoice.equals("2"))
                         lowestMark = findLowest(module, numOfStudents);
                    else if (menuChoice.equals("3"))
                         examMark = findGrade(module, numOfStudents, studentID);
                    else if (menuChoice.equals("4"))
                         studentIDSort(module, numOfStudents);
                         displayData(module, numOfStudents);
                    else if (menuChoice.equals("5"))
                         markSort(module, numOfStudents);
                         displayData(module, numOfStudents);
                    else if (menuChoice.equals("6"))
                         displayData(module, numOfStudents);
               } while (menuChoice.equalsIgnoreCase("Q") == false);
               System.exit(0);
     public static void inputRecords(StudentRecord module[], int numOfStudents)
          int i;
          String inputMark;
          String inputStudentID;
          for (i = 1; i < numOfStudents; i++)
               module[ i] = new StudentRecord();
               inputStudentID = JOptionPane.showInputDialog(null,
                                   "Please enter Student ID for position " + i + ":");
               module[ i].sID = Long.parseLong(inputStudentID);
               inputMark = JOptionPane.showInputDialog(null,
                                   "Please enter Student Mark for position " + i + ":");
               module[ i].mark = Integer.parseInt(inputMark);
     public static String findHighest(StudentRecord module[], int numOfStudents)
          int highStudentID;
          int j;
          StudentRecord temp = new StudentRecord();
          boolean intChange = true;
          int pass = 1;
          String outputMark;
          String outputSID;
          while((pass <= numOfStudents - 1) && (intChange))
               intChange = false;
               for (j = 1; j <= numOfStudents - pass; j++)
                    module[j] = new StudentRecord();
                    if(module[j].mark > module[j + 1].mark)
                         intChange = true;
                         temp.mark = module[j].mark;
                         temp.sID = module[j].sID;
                         module[j] = module[j + 1];
                         module[j + 1].mark = temp.mark;
                         module[j + 1].sID = temp.sID;
               pass++;
          outputSID = String.valueOf(module[module.length].sID);
          outputMark = String.valueOf(module[module.length].mark);
          return (outputSID + " " + outputMark);
     public static String findLowest(StudentRecord module[], int numOfStudents)
          String outputMark;
          String outputSID;
          int j;
          StudentRecord temp = new StudentRecord();
          boolean intChange = true;
          int pass = 1;
          while((pass <= numOfStudents - 1) && (intChange))
               intChange = false;
               for (j = 1; j <= numOfStudents - pass; j++)
                    module[j] = new StudentRecord();
                    if(module[j].mark > module[j + 1].mark)
                         intChange = true;
                         temp.mark = module[j].mark;
                         temp.sID = module[j].sID;
                         module[j] = module[j + 1];
                         module[j + 1].mark = temp.mark;
                         module[j + 1].sID = temp.sID;
               pass++;
          outputSID = String.valueOf(module[1].sID);
          outputMark = String.valueOf(module[1].mark);
          return (outputSID + " " + outputMark);
     public static String findGrade(StudentRecord module[], int numOfStudents, long studentID)
          String foundGrade = "";
          int i;
          String outputSID;
          String outputMark;
          for (i = 1; i <= module.length; i++)
               module[ i] = new StudentRecord();
               if (studentID == module[ i].sID)
                    outputSID = String.valueOf(module[ i].sID);
                    outputMark = String.valueOf(module[ i].mark);
                    foundGrade = (outputSID + " " + outputMark);
          if (foundGrade == "")
               JOptionPane.showMessageDialog(null,
                    "No grade found for Student: " + studentID);
          return foundGrade;
     public static void studentIDSort(StudentRecord module[], int numOfStudents)
          int i;
          int j;
          StudentRecord temp = new StudentRecord();
          for (i = (module.length - 1); i >= 0; i--)
               for (j = 1; j <= i; j++)
                    module[j] = new StudentRecord();
                    if (module[j - 1].sID > module[j].sID)
                         temp = module[j - 1];
                         module[j - 1] = module[j];
                         module[j] = temp;
     public static void markSort(StudentRecord module[], int numOfStudents)
          int i;
          int j;
          StudentRecord temp = new StudentRecord();
          for (i = (module.length - 1); i >= 0; i--)
               for (j = 1; j <= i; j++)
                    module[j] = new StudentRecord();
                    if (module[j - 1].mark > module[j].mark)
                         temp = module[j - 1];
                         module[j - 1] = module[j];
                         module[j] = temp;
     public static void displayData(StudentRecord module[], int numOfStudents)
          String outputMessage = "";
          int i;
          for (i = 1; i <= module.length; i++)
               module[ i] = new StudentRecord();
               outputMessage += (module[ i].sID + " " + module[ i].mark + "\n");
          JOptionPane.showMessageDialog(null,
               "Data Display\n" +
               "**** *******\n\n" +
               outputMessage,
               "Data Display", JOptionPane.INFORMATION_MESSAGE);
}

Try this piece of code...... I adapted it to your program, so it starts from 1. You should pass numOfStudents - 1 as numOfStudents to don't get the notorious error =D
if (menuChoice.equals("1"))
findHighest(module, numOfStudents - 1);
I added the println statement because in your prog isn't present an output routine (well, at last I didn't see it..... maybe because I'm sleepy =) )
public static void findHighest(StudentRecord module[], int numOfStudents)
String outputMark;
String outputSID;
StudentRecord retValue = new StudentRecord();
retValue.sID = module[1].sID;
retValue.mark = module[1].mark;
for (int i = 2; i <= numOfStudents; i++) {
     if (module.mark > retValue.mark) {
     retValue.sID = module[i].sID;
     retValue.mark = module[i].mark;
outputSID = String.valueOf(retValue.sID);
outputMark = String.valueOf(retValue.mark);
System.out.println(outputSID + " " + outputMark);
Hope it can help you

Convert an U8 array to a LabView data type

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