Object Type in the To Do List: Logical connection.
Meaning: Unexpected error in the management of the list of contacts. One of the connecting systems is either missing or displays on the To Do List.
Check for any missing leaf systems. Recompute the parent system to create the missing leaf systems and update the logical connection.
If step one does not update the logical connection, or no missing leaf systems exist, recompute the logical connection. You might need to recompute the parts again in order to generate the assembly connections for the updated logical connection.