Just a guess, but... One of the biggest problems with building executables is the path to other VIs. In the development environment, an example path might be C:\this path\my vi.vi While in the executable, the path changes to: C:\this path\executable.exe\my vi.vi I'm sure you can see the problems this can cause is the program does not take this into consideration. I ran into this a while ago. This almost sounds like that type of problem.
Rob
