Meaning: The object was placed with a relationship to another object. The other object has been moved in the model but this object, for an unknown reason, is no longer able to maintain the position relationship with the moved object.
Select the object in error, and redefine the placement of the object.
Click View > To Do List.
On the To Do List dialog box, select the object, and click Update .
The software updates the object and removes it from the To Do List.