"System Exec" command in NT / W95 How to use?

Hi LVers,
I can start the shell with the System Exec command with LV, but how can I put
additional (batch) commandos into it?
I already tried:
- piping "cmd < dir"
- batch files "mybatch.bat"
Where are the differencies btw. NT and W95
thanks
tom

I am not sure that I understand what you are trying to do.
Anyway, in LVWUtil32.zip you can find some VIs that improve the use of System Exec[http://digital.ni.com/public.nsf/3efedde4322fef19862567740067f3cc/824b3db43031317686256aaf00713218/$FILE/LVWUtil32.zip]. As far as I remember you have some good documentation inside.
Also, you can use a KeyGenerator [http://hamiltondesign-consulting.com/ftpfiles/SendKey.zip] to send commands to a shell window (via keystrokes).
Hope this helps

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The thing you have to remember is that System Exec is really more like using the Start -> Run command. It is not the same as having a command window open. Thus, if you cannot enter a valid command via Start -> Run, then your command will not work with System Exec as is. Usually you can use cmd /c or cmd /k as suggested to get the command window "environment". In some cases you need to resort to a batch file to get it working.

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Solved!
Go to Solution.

Wire a TRUE to the Run Minimized input.
Mike...
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"... after all, He's not a tame lion..."
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Hi Fonsi,
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How do you change the directory of system exec after it has ran once in the current vi

Hi all,
Attached is the sub vi that i am running in my main application. I run it twice and change the directory of the file to run. It appears that after i run this vi that i cant change the directory and it tries to run a file from the incorrect directory. Does anyone have any advice on how to fix this issue?
Attachments:
system execute command.vi ‏41 KB

matt198717 wrote:
Hi all,
Attached is the sub vi that i am running in my main application. I run it twice and change the directory of the file to run. It appears that after i run this vi that i cant change the directory and it tries to run a file from the incorrect directory. Does anyone have any advice on how to fix this issue?
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Never mind abt the bach file execution...
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sunnymanman wrote:
Thanks,
But How can I see both programs printout
"Happy Holiday"
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??First of all, you're not even calling the Happy Holiday one. If you want it to do something, you have to invoke it.
And by the way, in your comments, you mention that in one case, a new process is created. Actually, new processes are created each time you call Runtime.exec.
Anyway, if you want the output from the processes, you read it using getInputStream from the Process class. In fact, you really should read that stream anyway (read that URL I sent you to find out why).
If you want to print that output to the screen, then do so as you'd print anything to the screen.
in notepad HelloWorld.java, I can see it is opened,
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.bin not found
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I think you should use error handling in batch programming, see this link http://www.robvanderwoude.com/errorlevel.php
CLA 2014
CCVID 2014

How use System exec.vi...

hi,
i want to run a shortcut from a labview application. i know the command line to do this from MS DOS but i don't understand how works System exec.vi.
Could you help me giving some example?
Thank you

Use the command "start <path to shortcut>", or "cmd <path to shortcut>", as explained in this document.
Message Edited by smercurio_fc on 06-08-2007 09:46 AM

"System Exec" command in NT / W95 How to use?

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