Cause

In the parts database to be checked a part was found where a connection point 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 Properties tab to the front.
3. In the property table click [...] in the Data hierarchy level in the value field of the Connection point pattern property.
4. Select the required connection point pattern from the selection dialog opened.
   
5. Click [OK].
6. Close the parts management, save the modified data, and carry out a parts synchronization.
7. If required, start a new check run.