Cause

You use one and the same main terminal several times in different representation types of your schematic. For example the main terminal in the schematic exists in the representation type "Multi-line" and in the representation type "Overview".

Solution

1. Locate the relevant main terminal in the schematic using the Go to (graphic) functionality from the popup menu in the Message management dialog.
2. Launch the property dialog of the main terminal.
3. Change the main terminal into an auxiliary terminal by deactivating the Main terminal check box on the first tab or rename the main terminal.
4. Click [OK].
5. Then start a new check run.