OpenEdge Graphical Client has Stopped Working Fault Module Name clr.dll

Look in event viewer application log on the machine that has the issue for a time and date when the issue occurs and see what the logs say and create a support case with that information.

Additonally, collect the most recent protrace logs from the time and date when the issue occurred located in npo\found\fims on the database server, or found\fims from the N drive on a workstation. You can sort the Date Modified column so that the latest protrace logs come to the top and include this information in your support case.

In the protrace log, if you see this error, then it is a network issue in which the N drive is being disconnected:
C0000006 IN_PAGE_ERROR

See also the following:
SYSTEM ERROR WindowWndProc Exception code: C0000006 IN_PAGE_ERROR when using FIMS