OS.SYSTEM ERROR !!!

[Blubaugh, David A.]

To All,
I have been attempting to execute the following program within the
Python environment:

Myprogram.exe, which means this is an executable file!!

I would usually execute this program (with the appropriate arguments) by
going to following directory within MS-DOS (Windows XP):

C:\myprogramfolder\runMyprogram.exe 1 1 acc 0
The executable would execute perfectly.
However, when I would try to execute the following lines of source code
within a python script file:

import os

os.system(r"C:\myprogramfolder\run\Myprogram.exe 1 1 acc 0")
The executable file would start to execute until it would print an error
stating that it cannot use a (.dat) file, which is located under the
following directory:
C:\myprogramfolder\run\inputs\io\control.dat
I believe I may be missing something here that prevents the executable
file working within python from utilizing this (.dat). The printed
final error is the following:

ERROR opening inputs/io/control.dat

Does anyone know what that could be ??
Thanks,
David Blubaugh

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[Carsten Haese]

Blubaugh, David A. wrote:

To All,
I have been attempting to execute the following program within the
Python environment:

Myprogram.exe, which means this is an executable file!!

I would usually execute this program (with the appropriate arguments) by
going to following directory within MS-DOS (Windows XP):

C:\myprogramfolder\runMyprogram.exe 1 1 acc 0
The executable would execute perfectly.
However, when I would try to execute the following lines of source code
within a python script file:

import os

os.system(r"C:\myprogramfolder\run\Myprogram.exe 1 1 acc 0")
The executable file would start to execute until it would print an error
stating that it cannot use a (.dat) file, which is located under the
following directory:
C:\myprogramfolder\run\inputs\io\control.dat
I believe I may be missing something here that prevents the executable
file working within python from utilizing this (.dat). The printed
final error is the following:

ERROR opening inputs/io/control.dat

Does anyone know what that could be ??

The program (myprogram.exe) is not looking for
C:\myprogramfolder\run\inputs\io\control.dat, it's looking for
inputs/io/control.dat relative to its current working directory. That
will only work if the current working directory of the program is
C:\myprogramfolder\run. Is it?

--
Carsten Haese
http://informixdb.sourceforge.net

[giltay]

On Sep 30, 1:21*pm, "Blubaugh, David A." <[e-mail]:

I would usually execute this program (with the appropriate arguments) by
going to following directory within MS-DOS (Windows XP):

C:\myprogramfolder\runMyprogram.exe 1 1 acc 0

[snip]

import os

os.system(r"C:\myprogramfolder\run\Myprogram.exe 1 1 acc 0")

[snip]

ERROR opening inputs/io/control.dat

[snip]

I would add the following line right before your call to os.system:

os.chdir(r'C:\myprogramfolder\run')

If you have to change directories to run it properly in the Windows
shell, then you need to do it in Python, too.

HTH,
Geoff G-T

[Christian Heimes]

gi****@gmail.com wrote:

I would add the following line right before your call to os.system:

os.chdir(r'C:\myprogramfolder\run')

I wouldn't. os.chdir() tends to introduce all sorts of trouble. It's a
quick n'dirty hack for a small script but no solution for a large
program or library.

Christian