Re: OS.SYSTEM ERROR !!!

[Terry Reedy]

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.

Because you execute it in the necessary directory.

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")

This does not execute it in the proper directory.
os.getcwd() will tell you where you are -- mostly likely .../Pythonx.y.

Try:
os.chdir("C:/myprogramfolder/run") # / works fine, and without r prefix
os.system("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 ??

That file does not exist in the Pythonx.y directory where the program
starts ;-).

tjr