Meaning: The cross-section that originally was used to define the member part was removed. This could have been a result of a corrupt cross-section symbol that was removed by a repair script or the cross-section was eliminated because a catalog synchronization caused the removal of the occurrence's definition.
Click Select .
Set the locate filter to Member Parts.
Select the member part that is on the To Do List.
On the ribbon, select a new cross section from the Section name list.
Choose a new cross-section name even if the name is the same as the originally assigned cross-section.