Please quote the relevant parts of the email you're replying to - your emails 
have massively diminished usefulness to the archives.

On 17 Feb 2012, at 12:21, Negin Nickparsa wrote:

> It generates NULL


My bad, try this…

$cmd = 'C:/Program\\ Files/GAMS23.7/gams.exe'.' '.escapeshellarg('C:/Program
Files/GAMS23.7/trnsport_php.gms').' 2>&1';

If that still doesn't seem to work, I suggest you try just executing the 
command without arguments…

$cmd = 'C:/Program\\ Files/GAMS23.7/gams.exe 2>&1';

Backticks execute a command and return the output: 
http://php.net/language.operators.execution

-Stuart

-- 
Stuart Dallas
3ft9 Ltd
http://3ft9.com/

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