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 parts management mark the line with the message in the Messages tab and select the Go to popup menu item for this line.
   The respective part is marked in the tree view of the parts management.
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. Click [Apply].
7. If required, start a new check run.
8. Close the parts management and perform a parts data synchronization.