Error 3426

Action Cancelled Associated Object

Resolution:

Conflicts between MPOS and another application have been encounter. This usually happens when you install another application that is using the same files as MPOS. To resolve first backup data away from computer insert MPOS disc and click "repair" . . .
Version 8
Can also be an indication of database corruption. Backup your data away from your installation folder and do a Database Tools - Compact and Repair to resolve this error in Version 8 and above if installation repair is not the issue.