thank you. that's a good suggestions.
The problem raised 2 application events in the event viewer.
1. source "Application error"
event id: 1000
type: error
Faulting application msaccess.exe, version 10.0.2616.0, faulting module msaccess.exe, version 10.0.2616.0, fault address 0x00035c14.
For...