Read from a file on realtime basis with time stamp

Hi,
I want to read from a .txt file having two columns separated using tab delimiter on a real time basis. I am trying to buld a temp data logger. Also I have multiple senors to take input from. I need to have a select button on front panel and want the graph to be displayed for that senor only. I have around 20 temp sensors. I need to select which temp sensor graph is currently displayed . please help!!! Also how can i attach a file to the messages I post here!!! Any help would be greatly appreciated..
Thanks in advance
Ratnesh
Attachments:
test.vi ‏29 KB

The stack of buttons is simply an ARRAY of boolean controls.
Your approach with multiple cases is a dead end. Forget it when the number of cases is larger that a few.
After a look to your data file, I have a few questions/comments:
1/ Is there any reason not to process the data BEFORE storing them in a file ? That is to say in a REAL real time basis ?
2/ instead of using the military time format, which requires some preprocessing before storage, and some post processing for reading the data, why don't you use a more convenient format ?
3/ There are five columns. Are columns 4 and 5 for sensors 3 and 4 ?
4/ The temperature data seem to vary a lot within only 20 secs. Is this normal ? Or is this the result of strong noise ?
Attached is a vi which show how to read sensor 1 against time. I think you will succeed in embedding it in my previous vi. If not, that means simply that you really have to spend more time studying LabVIEW basic programming techniques. You are lucky there since a/ you have a project, b/ you found NI forum to get answers to your questions
Happy new year (christian time format)
CC
Chilly Charly (aka CC)
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Attachments:
Get sensor data.zip ‏16 KB

Similar Messages

Read from text file and plot in real time

Hello to everybody,
I recently started using labview and so I know very few features, I apologize for any crap I'm about to write.
My problem is as follows:
_ A wireless node is sampling, with a known frequency, the voltage and the current of an electronic device
_ These data are sent to a coordinator connected to the PC
_ Each packet sent includes a single column with: Letter V followed by voltage samples, Letter I followed by current samples (all in a single column as in the attached example)
_ The coordinator saves it in a .txt file
I want to do a labview application that:
_ Reads that file (continuosly update by the coordinator)
_ Plots on two different graphs the values (over the time) of current and voltage
Thanks for your help
Danilo
Attachments:
TextData.txt ‏1 KB

There are File IO examples that ship with LV which show you how to write to red from a file . A more fundamental question though is why have the file at all? Is it serving strictly as a data communication channel, or will it be used for something else?
The "coordinator" that you mention, can it be accessed directly? Serial IO? TCP/IP? Telnet? ActiveX? .NET? Anything?
If so, that would be the preferred way to handle this situation.
Mike...
PS: Sorry for the next bit, but I used to be a magazine editor and my grandmother was a school teacher so I am just a tiny bit anal retentive about word usage: In English "data" is a funny word in that while it is a singular form, it is (depending upon context) often understood to referring to multiple things and so can be sort of plural. Consequently, it is proper to say: "This data is sent.. " or "The data indicates...", but not, "The data are showing..". Likewise it is always incorrect to try to make it plural by saying "datas".
PPS: The same goes for the word "code" when used as a noun. It can also be a verb, but that's a whole different rant...
PPPS: Also be aware that many of the people who know me well would object to the "tiny bit" part...
Certified Professional Instructor
Certified LabVIEW Architect
LabVIEW Champion
"... after all, He's not a tame lion..."
Be thinking ahead and mark your dance card for NI Week 2015 now: TS 6139 - Object Oriented First Steps

Read from Measurement File Express VI - Time information

I need some assistance with a small problem with building reports of collected data. I don't see it very relevant, but I'm collecting data from several modules on a 9074 cRIO. I'm not using the cRIO the way it is intended, but it is perfect for my needs. Anyway, I'm collecting the different types of data in RT, then using the express VI "Write to Measurement File" with TDMS option selected and one time column only selected. Also one header, etc. Nothing fancy.
In another VI I want to use this collection of .tdms files to create an Excel report. Everything is working good however I need a time column for reporting my data. When I view the .tdms file using Excel Importer, the time column is there and perfect, with the next column a relative time (or iteration) and then columns with the signal names at top and all the data below. Perfect.
I'm similarly using the "Read from Measurement File" Express VI to get the data back the same way it went in. I have everything in it's correct place on building the Excel Report, but I haven't been able to find any way to include the first time column in my import. I can use "Get Attributes" Express VI to get the signal names from the read, but that's not going to help with the time data. How is it possible that Labview allows to put the time data there, but not retrieve it? I'm aware of the warnings that Timestamps aren't supported by TDMS file format vs LVM, but there MUST be a way to retrieve that time information if "Excel Importer" can do it.
If that time column in the TDMS file is somehow computed using the start timestamp and dt, can someone explain how to compute that for my report?
Unfortunately, I can't use the LVM format because I need to allow the users of these VI's the backup of using Excel Importer to see this data if my report generation VI is not functional.
I'll attach one of the TDMS files for illustration. The first column of the second worksheet is exactly the data I need for my report.
Attachments:
TDMS Imported.xls ‏28 KB

DylanC,
Your solution works as needed. Thank You.
I think I found a better solution though. Apparently if you convert a signal from the Express VI "Read from Measurement File" into a waveform the time data required is included, then you can convert to a string with a for loop and insert it as a row header into a table. The result gives me what I need. I attached a screenshot if someone is interested.
AWyers
Attachments:
TableFromTDMS.JPG ‏61 KB

File with time stamp

Hi All,
I using RFC to file scenario ,in this when file is created it folder it is coming with date and time stamp.but i am not using add time stamp in processing paramerts.i have checked the file name in communication channel monitoring it is coming without timestamp
but in folder file is getting created with time stamp.
Regards

Hi Gangadhar,
In the receiver file adapter, under Processing tab, see the value of File Construction Mode.
This value should be Create instead of Add Time Stamp.
After making the changes save & activate the file receiver channel. The output file then will not have timestamp appended to its name.
Regards,
Gautam Purohit

*** Reading from a file with tags ***

Hi guys,
I don't know if it is possible, but can you read from a file that contains tags?
For example, say i want to write a simple program that just outputs the details of a person that it reads in from someFile.dat
someFile.dat
<DETAILS>
<NAME> Napolean Solo </NAME>
<ADDRESS> 10 Some Street, SomePlace </ADDRESS>
<PHONE> 33333 </PHONE>
<NAME> Illya Kuryakin </NAME>
<ADDRESS> 12 Some Street, SomeOtherPlace </ADDRESS>
<PHONE> 44444 </PHONE>
</DETAILS>
So what i want is program that outputs to the screen like:
Napolean Solo
10 Some Street, SomePlace
33333
Illya Kuryakin
Is this possible in Java?????
I really appreciate any help that is given,
thanks in advance :)

So what i want is program that outputs to the screen
like:
Napolean Solo
10 Some Street, SomePlace
33333
Illya Kuryakin
...If that's all you want (and since a valid xml file has to start with at least <?xml version="1.0"?> so XML is irrelevant to this discussion) then this will generate the output you specify from the imput you provided:import java.io.*;
import java.util.StringTokenizer;
public class SimpleAngleBracketEliminator {
public static void main (String[] args) throws Exception {
    BufferedReader in = new BufferedReader(new FileReader(args[0]));
    String line;
    while ((line=in.readLine())!=null) {
      StringTokenizer st = new StringTokenizer(line, "<>");
      while (st.hasMoreTokens()) {
        st.nextToken();
        if (st.hasMoreTokens()) {
          System.out.print(st.nextToken().trim());
      System.out.println();
}But if you actually want the benefits of real XML, then use a real XML parser.
Pete

Problem with reading from DAT file. FileNotFound exception

Can't seem to find the issue here. Two files, one (listOfHockeyPlayers) reads from a DAT file a list of players. The other (HockeyPlayer) has just the constructor to make a new hockey player from the read data.
import javax.swing.*;
import javax.swing.event.*;
import java.util.*;
import java.awt.*;
import java.io.*;
public class ImportHockeyPlayers
private ArrayList<HockeyPlayer> listOfHockeyPlayers = new ArrayList<HockeyPlayer>();
public ImportHockeyPlayers(String fileName)
throws FileNotFoundException
try
   Scanner scan = new Scanner(new File(fileName));
   while (scan.hasNext())
    //Uses all the parameters from the HockeyPlayer constructor
    String firstName = scan.next();
    String lastName = scan.next();
    int num = scan.nextInt();
    String country = scan.next();
    int dob = scan.nextInt();
    String hand = scan.next();
    int playerGoals = scan.nextInt();
    int playerAssists = scan.nextInt();
    int playerPoints = playerGoals + playerAssists;
    //listOfHockeyPlayers.add(new HockeyPlayer(scan.next(),scan.next(),scan.nextInt(),scan.next(),scan.nextInt(),scan.next(),
     //scan.nextInt(),scan.nextInt(),scan.nextInt()));
catch(FileNotFoundException e)
   throw new FileNotFoundException("File Not Found!");
public String toString()
String s = "";
for(int i = 0; i < listOfHockeyPlayers.size(); i++)
   s += listOfHockeyPlayers.get(i);
return s;
public class HockeyPlayer
private String playerFirstName;
private String playerLastName;
private int playerNum;
private String playerCountry;
private int playerDOB;
private String playerHanded;
private int playerGoals;
private int playerAssists;
private int playerPoints;
public HockeyPlayer(String firstName, String lastName, int num, String country, int DOB,
String hand, int goals, int assists, int points)
this.playerFirstName = firstName;
this.playerLastName = lastName;
this.playerNum = num;
this.playerCountry = country;
this.playerDOB = DOB;
this.playerHanded = hand;
this.playerGoals = goals;
this.playerAssists = assists;
this.playerPoints = goals + assists;
DAT File
Wayne Gretzky 99 CAN 8/13/87 R 120 222
Joe Sakic 19 CAN 9/30/77 L 123 210These are all in early development, we seem to have the idea down but keep getting the odd FileNotFound exception when making an object of the ImportHockeyPlayers class with the parameter of the DAT file.
We might even be on the wrong track with an easier way to do this. To give you an idea of what we want to do...read from the file and be able to pretty much plug in al lthe players into a GUI with a list of the all the players.
Thanks for your time.

Thanks for the tip on the date format...good to
know.
public static void main(String[] args)
GUI gui = new GUI();
ImportHockeyPlayers ihp = new
ImportHockeyPlayers("HockeyPlayers.dat");
}It's just being called in the main.
Throws this error:
GUI.java:39: unreported exception
java.io.FileNotFoundException; must be caught or
declared to be thrown
ImportHockeyPlayers ihp = new
ImportHockeyPlayers("HockeyPlayers.dat");
^This error is simply telling you that an exception may occur so you must enclose it in a try catch block or change the main method to throw the exception as follows
public static void main(String[] args) throws
                      java.io.FileNotFoundException {
     GUI gui = new GUI();
     ImportHockeyPlayers ihp = new
     ImportHockeyPlayers("HockeyPlayers.dat");
}or
public static void main(String[] args) {
     GUI gui = new GUI();
     try {
          ImportHockeyPlayers ihp = new
          ImportHockeyPlayers("HockeyPlayers.dat");
     catch (FileNotFoundException e) {
          System.out.println("error, file not found");
}I would reccomend the second approch, it will be more helpful in debugging, also make sure that the capitalization of "HockeyPlayers.dat" is correct
hope that helps

Read from spreadsheet file with multiple delimiters

Is there a way to specify multiple delimitors in the read from spreadsheet file vi? I have a file that i need to read in that contains both space and comma delimitors and would like to read that data into an array using both delimitors (or not and). Below is the data I'm trying to read.
;attenuator data table
att00:   db       000h,015h,017h,035h,03Ch,03Eh,03Eh,05Ch,05Eh,05Eh
att10:   db       07Ch,07Eh,07Fh,09Dh,09Fh,09Fh,0BDh,015h,017h,035h
att20:   db       03Eh,03Eh,05Ch,05Ch,05Eh,07Ch,07Ch,07Eh,09Dh,09Dh
att30:   db       09Fh,0BDh,000h,000h,000h,002h,002h,002h,002h,003h
att40:   db       021h,021h,021h,021h,021h,023h,023h,023h,023h,023h
att50:   db       041h,041h,048h,048h,048h,04Ah,04Ah,04Ah,04Ah,068h
att60:   db       068h,068h,068h,068h,068h,06Ah,06Bh,06Bh,06Bh,089h
att70:   db       089h,089h,089h,08Bh,08Bh,08Bh,08Bh,0A9h,0A9h,0A9h
att80:   db       0A4h,0A6h,0A6h,0A6h,0A6h,0C4h,0C4h,0C4h,0C4h,0C6h
att90:   db       0C6h,0C6h,0C6h,0E4h,0E4h,0E5h,0E5h,0E7h,0E7h,0E7h
    END
I'm looking to just read in the data adjust the hex values and then save the data in the exact form which I read it in. If read from spreadsheet file can not recognize multiple delimiters that is all I need to know. I do not want to spend time reading it in using a single delimitor and doing a bunch of string manipulation. I'm also working with LabView 8.5 if that makes a difference.

You should use "scan string for tokens", and wire an array of delimiters.
One nice behavior is the fact that consecutive delimiters are contracted into one (by default), so e.g. if your delimiters is an array containing a space and a comma, a sequence of three spaces and a comma would still count as one delimiter.
For some ideas, have a look at my old example here:
http://forums.ni.com/ni/board/message?board.id=170&message.id=192847#M192847
LabVIEW Champion . Do more with less code and in less time .

I am getting "a network error occurred while attempting to read from the file c:\windows\installer\itunes.msi" when I attempt to download itunes, can someone help me with this?

I am getting "a network error occurred while attempting to read from the file c:\windows\installer\itunes.msi" when I attempt to install itunes. Can anybody help me to resolve this issue?

You can try disabling the computer's antivirus and firewall during the download the iTunes installation
Also try posting in the iTunes forum since it is not an iPod touch problem.

Trying to update to iTunes 10.4.1 and I get a message "A network error occured while attempting to read from the file C:|Windows|Installer|iTunes.msi" Running WIndows 7 with all updates done. I have never had an issue with iTunes updating before. Anyo

iTunes has tried to update itself and runs into an error and tells me to manually install. When I d/l and run the iTunesSetup.exe file I always encounter the following error message...
"A network error occured while attempting to read from the file C;|Windows|Installer|iTunes.msi" and iTunes does not update to iTunes 10.4.1.
Anyone know what is creating this error message? Thanks for the help...

(1) Download the Windows Installer CleanUp utility installer file (msicuu2.exe) from the following Major Geeks page (use one of the links under the "DOWNLOAD LOCATIONS" thingy on the Major Geeks page):
http://majorgeeks.com/download.php?det=4459
(2) Doubleclick the msicuu2.exe file and follow the prompts to install the Windows Installer CleanUp utility. (If you're on a Windows Vista or Windows 7 system and you get a Code 800A0046 error message when doubleclicking the msicuu2.exe file, try instead right-clicking on the msicuu2.exe file and selecting "Run as administrator".)
(3) In your Start menu click All Programs and then click Windows Install Clean Up. The Windows Installer CleanUp utility window appears, listing software that is currently installed on your computer.
(4) In the list of programs that appears in CleanUp, select any iTunes entries and click "Remove", as per the following screenshot:
(5) Quit out of CleanUp, restart the PC and try another iTunes install. Does it go through properly this time?

Problem with reading from bin file into Vector

What am I doing wrong? It works fine to write the vector to the bin file and then read from it. But if I try just to read from the file it wont work.
Does anybody has any good advice to give when it comes to reading data form a bin file??
import javax.swing.*;
import java.util.*;
import java.io.*;
class Binaerfil
     public static void main (String [] args) throws IOException, ClassNotFoundException{
          ObjectOutputStream utFil = new ObjectOutputStream (new FileOutputStream("HighScoreLista.bin"));
          int po = 50;
          Spelare s;
          Spelare s1, s2, s3, s4, s5,s6,s7,s8,s9,s10;
          String f�rNamn;
          Vector v = new Vector();
          s1 = new Spelare("Mario", 100);
          s2 = new Spelare("Tobias",90 );
          s3 = new Spelare("Sanja", 80 );
          s4 = new Spelare("Marko", 70 );
          s5 = new Spelare("Sofia", 60 );
          s6 = new Spelare("Kalle", 50 );
          s7 = new Spelare("Lisa", 40 );
          s8 = new Spelare("Pelle", 30 );
          s9 = new Spelare("Olle", 20 );
          s10 = new Spelare("Maria",10 );
          v.add(s1);
          v.add(s2);
          v.add(s3);
          v.add(s4);
          v.add(s5);
          v.add(s6);
          v.add(s7);
          v.add(s8);
          v.add(s9);
          v.add(s10);
          System.out.println ("Before writing to file");
          System.out.println(v);
          //Write to file
          utFil.writeObject (v);
          utFil.close();
     ObjectInputStream inFil = new ObjectInputStream (new FileInputStream("HighScoreLista.bin"));
          v =(Vector) inFil.readObject();
     System.out.println (v);
          inFil.close();
}

Because what you are writing to the file is a vector, that is all you can get out. You are actually reading a single Object from the file which you can cast to a Vector, from which you can access the data stored inside. If you want to read the Spelare instances from the file, you will have to save them individually to the file. You will have to implement Serializable and look up the API to do that.

Read from text file vi won't read file...

I am very new to LV programming so I hope you forgive any stupid mistakes I am making.   I am using Ver. 8.2 on an XP machine.
I have a small program that stores small data sets in text files and can update them individually or read and update them all sequentially, sending the data out a USB device.   Currently I am just using two data sets, each in their own small text file. The delimiter is two commas ",,".
The program works fine as written when run in the regular programming environment. I noticed, however, as soon as I built it into a project that the one function where it would read each file sequentially to update both files the read from text file vi would return an empty data set, resulting in blank values being written back into the file. I read and rewrite the values back to the text file to place the one updated field (price) in it'sproper place. Each small text file is identified and named with a 4 digit number "ID".   I built it twce, and get the same result. I also built it into an installer and unfortunately the bug travelled into the installation as well.
Here is the overall program code in question:
Here is the reading and parsing subvi:
If you have any idea at all what could cause this I would really appreciate it!
Solved!
Go to Solution.

Hi Kiauma,
Dennis beat me to it, but here goes my two cents:
First of all, it's great to see that you're using error handling - that should make troubleshooting a lot easier. By any chance, have you observed error 7 when you try to read your files and get an empty data set? (You've probably seen that error before - it means the file wasn't found)
If you're seeing that error, the issue probably has something to do with this:
Relative paths differ in an executable. This knowledge base document sums it up pretty well. To make matters more confusing, if you ever upgrade to LabVIEW 2009 the whole scheme changes. Also, because an installer contains the executable, building the installer will always yield the same results.
Lastly, instead of parsing each set of commas using the "match pattern" function, there's a function called "spreadsheet string to array" (also on the string palette) that does exactly what you're doing, except with one function:
I hope this is helpful...
Jim

UPDATE : Toshiba Recovery Wizard 'cannot read from source file or disk' error (satellite L500)

UPDATE 2: Phoned Toshiba tech support again, guided by techie to begin the recovery again. Just before phoning I was able to go into recovery options and view the drive setup and all the files that couldn't be read are on the CD so I've no idea why the error kept occuring, and neither did the techie. Fingers crossed it works this time but I'm not overly hopefully given that we've just done exactly the same as I did before. UPDATE 1: I got into the BIOS and reset everything back to defaults and yay, my toshiba recovery wizard now starts! :-D On the down side, when trying to do a factory default software / out of the box recovery I continually get error messages with regards to copying the files, for example
cannot read from source file or disk
7z.dll
Type application extension
size 585kb
date modified 7/14/2009 10.26pm
other read / copy errors include PREINST6.SWM, BOOT_32, BOOTPRIORITY, CHECKMAXPTSIZE, CHGBOOT, CPU, CPUCHECK, CREATEPARTITION, CTRLDRVINFO, DISKWIPE, DMI, DPINST32, EBLIB.DLL, ERRORDIALOG, EW3BOOTSEQ, FWLINK, FWLINK.SYS, GETHDDINFO, GETKEYSTATE, IMAGEX, INFILED, INITRECAREA, KRAIADAPI.DLL ..... at which point I decided to 'skip all' :-/
Any explanations as to what's going on and how I might be able to fix it would be very much appreciated! :-) Thank you!
I have a two and half year old satellite L500 with an Intel i-3 and 4 gigs of RAM, on which I was running Windows 7.
Admittedly it’s had rather a hard life (I ran some very demanding CAD / graphics software on it) but it had always performed well until just recently, when after suffering several BSOD (which had never happened before), the hard drive failed.
I partitioned and formatted a brand new hard drive (which is perfectly fine and functions normally when hooked up to another laptop with a SATA to USB cable) and obtained system recovery discs from Toshiba. Unfortunately, when I try and run the first disc, windows starts to load files but then generates an error screen with the message Error F3-F100-0003 and a request to turn the computer off.
When I use the windows Memory Diagnostic to get into the Windows Boot Manager Screen I get the following;
Windows failed to start. A recent hardware / software change might be the case.
To fix the problem
Insert your windows installation disc and restart your computer
Choose your language settings and click ‘next’
Click ‘repair your computer’
File: \boot\memtest.exe
Status: 0xc000000f
Info: the selected entry could not be loaded because the application is missing or corrupt.
I can also use F8 on startup to get into the advanced boot options but selecting any of them simply results in the F3-F100-0003 error message. I’ve run a memory test using the UBCD, which tells me the memory is fine, and tried another hard drive (which also works perfectly well in another laptop) but no joy. On phoning Toshiba support the techie said my hard drive had failed, but as I say, both hard drives are perfectly fine / usable when hooked up to another laptop. I’m now completely stuck as to what the problem is and how I might resolve it – any advice / suggestions would be most gratefully received! Thank you in advance :-)

Satellite L655-S5096
Downloads here.
the second disc gives me the the "cannot read from source file or disk PREINST8.SWM"
My best guess is that the disc is not readable. Try copying it to another. Sometimes that works.
Otherwise, order new discs from Toshiba.
-Jerry

Why does Read from Text file default to array of 9 elements

I am writing to a text file starting with a type def. cluster (control) of say 15 dbl numeric elements, that works fine I open the tab-delimited text file and all of the elements appear in the file. However when I read from the same text file back to the same type def. cluster (indicator), the read from text file defaults to 9 elements?? Is there a way to control how many elements are read from the file. This all works great when I initially use a cluster of 9 elements and read back to a cluster of 9 elements.
Solved!
Go to Solution.

From the LabVIEW Help: http://zone.ni.com/reference/en-XX/help/371361G-01/glang/array_to_cluster/
Converts a 1D array to a cluster of elements of the same type as the array elements. Right-click the function and select Cluster Size from the shortcut menu to set the number of elements in the cluster.
The default is nine. The maximum cluster size for this function is 256.
Aside: so, how many times has this question been asked over the years?

How to open saved files using 'read from text file' function

Hi everyone, I am having a hard time trying to solve the this particular problem ( probably because I am a newb to lanbview ). Anyway , I am able to save the acquired waveforms by using the 'Write to text file' icon. I did manually modify the block diagram of the 'Write to text file' icon and create the correct number of connector so as to make my program work. But now I have no idea on how to modify the block diagram of the 'Read from text file' block diagram to make my program 'open' my saved waveforms. Or i do not have to modify anything from the block diagram of the 'Read from text file'? Can anyone teach/help me connect up? Do i need the build array on the "open" page?
Here are some screenshots on part of my program
let me know if you guys would need more information / screenshots thank you!
Attachments:
ss_save.jpg ‏94 KB
ss_open.jpg ‏94 KB
modified_writetotextfile.jpg ‏99 KB

Ohmy, thanks altenbach. oh yeah i forgot about those sub VIs. will upload them now. Was rather demoralized after reading the comments and really struck me on how weak i'm at on labview really hope to get this done. But of course i have to study through and see how it works. Actually i am going to replace those 'signal generators sub vi' with ThoughtTechonology's sample code so i can obtain data waveforms real-time using Electrocardiography (ECG) ,Electromyography (EMG ) and Electroencephalography (EEG) hopefully i can find out how to connect the sample code.
( ps . cant connect it now unless my program is working otherwise labview will crash )
( p.s.s the encoder of my biofeedback trainer already acts as an DAQ so i wont need to place an DAQ assistant in my block diagram i suppose )
The sample code of ThoughtTechnology is named as attachment.ashx.vi. too bad i cant use it and present it as my project
Attachments:
frequency detactor.vi ‏53 KB
signal generator.vi ‏13 KB
attachment.ashx.vi ‏40 KB

LabVIEW for ARM 2009 Read from text file bug

Hello,
If you use the read from text file vi for reading text files from a sdcard there is a bug when you select the option "read lines"
you cannot select how many lines you want to read, it always reads the whole file, which cause a memory fault if you read big files!
I fixed this in the code (but the software doesn't recognize a EOF anymore..) in CCGByteStreamFileSupport.c
at row 709 the memory is allocated but it tries to allocate to much (since u only want to read lines).
looking at the codes it looks like it supposed to allocated 256 for a string:
Boolean bReadEntireLine = (linemode && (cnt == 0));
if(bReadEntireLine && !cnt) {
  cnt = BUFINCR;    //BUFINCR=256
but cnt is never false since if you select read lines this is the size of the file!
the variable linemode is also the size of the file.. STRANGE!
my solution:
Boolean bReadEntireLine = (linemode && (cnt > 0)); // ==
if(bReadEntireLine) {    //if(bReadEntireLine && !cnt) {
  cnt = BUFINCR;
and now the read line option does work, and reads one line until he sees CR or LF or if the count of 256 is done.
maybe the code is good but the data link of the vi's to the variables may be not, (cnt and linemode are the size of the file!)
count should be the number of lines, like chars in char mode.
linemode should be 0 or 1.
Hope someone can fix this in the new version!
greets,
Wouter
Wouter.
"LabVIEW for ARM guru and bug destroyer"

I have another solution, the EOF works with this one.
the cnt is the bytes that are not read yet, so the first time it tries to read (and allocate 4 MB).
you only want to say that if it's in line mode and cnt > 256 (BUFINCR) cnt = BUFINCR
the next time cnt is the value of the bytes that are not read yet, so the old value minus the line (until CR LF) or if cnt (256) is reached.
with this solution the program does not try to allocate the whole file but for the max of 256.
in CCGByteStreamFileSupprt.c row 705
if(linemode && (cnt>BUFINCR)){
cnt = BUFINCR;
don't use the count input when using the vi in line mode. count does not make sense, cnt will be the total file size. also the output will be an array.
linemode seems to be the value of the file size but I checked this and it is just 0 or 1, so this is good
update: damn it doesn't work!
Wouter.
"LabVIEW for ARM guru and bug destroyer"

Read from a file on realtime basis with time stamp

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