Cause

Possibility 1

A part placement was deleted later from the mounting panel after a report or moved such that its insertion point is no longer within the mounting panel.

Possibility 2

A wiring diagram was removed from the black box assigned to the mounting panel after a report or moved such that the insertion points of the components shown are no longer within the mounting panel.

Solution

1. Locate the relevant mounting panel in the schematic using the Go to (graphic) functionality from the popup menu in the Message management dialog.
2. Check whether the insertion points of all part placements are inside the mounting panel.
3. If this is not the case move the relevant part placements appropriately.
4. Also use the Go to (cross-referenced) functionality to switch to the black box assigned to the mounting panel with the connection diagrams.
5. Check here whether all DTs for the items shown on the connection diagrams are also available for the part placements on the mounting panel.
6. If not, delete all the connection diagrams inside the black box and start a new report.
7. Furthermore check by pressing the [I] key whether all insertion points of the items shown in the connection diagrams are within the black box. If not, move the relevant connection diagrams as appropriate.
8. Then start a new check run.