Cause

In the parts database to be checked a part was found where a drilling pattern was entered which EPLAN cannot find.

Solution

1. In the message management dialog mark the line with the message and select the Properties popup menu item.
   
   The Parts management dialog is opened, the respective part is already marked in it.
2. Bring the Manufacturing tab to the front.
3. In the Drilling pattern column click the table entry and then click [...].
4. Select the required drilling pattern from the selection dialog opened.
5. Close the parts management, save the modified data, and carry out a parts synchronization.
6. Then start a new check run.