I've got an application that's been in use for a few months. It's nothing fancy, it just compiles data from a few sources and prints reports. At some point I must have made some change (or something on their computer changed), but now when I attempt to run reports the program will fail with a fatal exception.

Originally, the program wasn't particularly fast generating the reports, but it worked. Now the harddrive starts to run, and after 2-3 minutes it dies. Of course, the program works OK on my development machine (as an .EXE or even in it's uncompiled form). Anyone have ideas on where I should start looking for the problem? I've tried it on about 5 different computers at the office, with the same results.

-Paul