|I suspect that this program has started reacting badly to some change that you have introduced on all the affected machines. If so it will be a hard nut to crack unless you can think of something you did just before the problem first came along. Its probably something that the original programmer could not have anticipated.|
If the company that wrote the program still exists it would be worth you contacting them, as the answer may be to modify the program.
If it has a commercial name then please let us know what it is, in the hope that we can identify it and somhow fathom it out.
If it is a DOS based program it might run if you shut down to MS-DOS and run the program from there.
some other bloke...