"EXE has stopped working ..."

[arnoldhf]

I have started converting 3 of a family of inter-related QB programs to QB64 and have run into the issue of getting the Windows message:

"program" has stopped working

A problem caused the program to stop working correctly.
Windows will close the program  etc, etc.

The message is not immediate but comes up within a minute on all 3. 

Each program can start another using RUN. Sometimes the message appears when another program loads but before the program itself displays its screen.

Within one program I do some data file access and after pulling up records a few times the error appears.

Any suggestions on how to diagnose or eliminate the issue?

Thanks,