>>>>Hello,
>>>>
>>>>I'm trying to use a config file to change the default value of the system variable _ASCIICOLS in a shipping .exe file.
>>>>I created a file with this in it:
>>>>_ASCIICOLS = 200
>>>>
>>>>I invoke the app like this:
>>>> myapp.exe -cmyconfigfile.txt

>Complete SWAG - and I doubt it would help, but try to change the extension of the config file to fpw.

In general case you'd be right, but the command line has the proper switch to override that - and then the filename and extension can be anything.