Divide by Zero error, ntvdm.exe

Running NT4.0 SP5 on a DELL box. A Dr. Watson error from the ntvdm.exe with a divide by zero error appears after 45min to an 1hr of inactivity. No error occurs during hours of use but only after idle time. Have reloaded the service pack, loaded SP6, stopped any 16bit services that are running. This is happening on several machines in a staged network running an X windows application to connect with a VMS server and application. How can I capture the program or application that is causing this error?