problem in using system to run a program.

I am using

system('GPA.exe ' . $filename);

to run a program GPA.exe

this program do the following things.
../GPA.exe filename.txt
and will generate another file

HOWEVER, the problem is, there is no new file generated and I doesn't
get an exception.
I don't know why. Can somebody give me a clue?

Sorry for posting such silly questions, I am really new to PHP.

Thanks a lot

It is possible the exe expects to deposit the newly
created file in "the current directory"
.......which in the web-server context ends up undefined,
or perhaps defaulting to an illegal area.

exe sounds like windows stuff, which I try hard to know
little about. But that sort of trouble often happens on
a unix-like system.

(when you run the program the user is you.
When the webserver runs the program the 'user'
has another definition and another permission set)

That make sense.I am currently using linux to implement this.
but do you know how to solve this?

Thanks a lot
Cheers

fAnS.
pittendrigh wrote:

fAnSKyer wrote:You're running a .exe file on Linux?

This might be a silly question, but do you know that
../GPA.exe filename.txt
actually works?

Colin