topic Running a batch file with error output in LabVIEW

Running a batch file with error output

Nghtcrwlr — Mon, 19 Mar 2018 11:05:42 GMT

Hello all

I have a situation where i have to run a .bat file to run an external program. As soon as the external program is run, it needs a trigger signal to be executed. Now , i need to get error outputs from System Exec. VI. ( because when an error comes in the external prgm, i need to see it )

I used a System Exec.vi to run .bat file with wait until completion = True. But then, the trigger VI is not executed.

with wait until completion = False, the .bat file is executed but then i dont get any error outputs.

is there any other way to run the batch file and to get standard outputs?

Re: Running a batch file with error output

n_dakota — Thu, 05 Apr 2018 14:16:20 GMT

Hi Nghtcwrlr,

What you described below sounds like expected behavior of an environment.To achieve the logic you are expecting you would need to add some extra functionality in between that would store error like simple logging to file.

Would this work for you?

Re: Running a batch file with error output

jwscs — Thu, 05 Apr 2018 14:22:08 GMT

perhaps you can have something like a last line "SUCCESS" or "FAIL" that your .bat produces and then you can parse the output for this line

Re: Running a batch file with error output

Nghtcrwlr — Fri, 20 Apr 2018 06:07:07 GMT

Hi jwscs,

Thanks for the tip. i added a " >>Output.txt" line in the .bat file and the outcome ( Error AND/OR SUCCESS) of the bat file is saved in to this txt file. After that i check the last line of the txt file and proceed further.