I am checking on the Network, but YIKES!

The user reports: "I had the three screens in the background open. I minimized the system and worked on something else and when I went back to the system, this appeared."

The message displayed is:

Microsoft Visual FoxPro has stopped working

A problem caused the program to stop working correctly.
Windows will close the program and notify you if a solution is available.

Any ideas? this is a system that has been running since April 1.