There is no contact between the two systems. Please review the model, and check the connected systems. (Molded Forms)
Meaning: The logical connection is on the To Do List because its parent system has no contact with an intended boundary.
Verify that all of the boundaries of the parent system are valid and that proper contact with the boundaries exists.
Check for other boundary-related To Do List errors on the parent system. Clearing those errors might resolve this issue.
Recompute the object on the To Do List.