Message
Stair or Ladder is missing its top supporting plane or edge.
Severity
Normal.
Detailed Description
A stair or ladder has relationships to its inputs: top edge, bottom plane, and an optional reference edge. The location of the stair or ladder depends on these inputs; therefore, if any one of inputs is missing (top plane/edge), the stair or ladder is orphaned.
Possible Cause
Deleting the original top reference edge geometry causes the stair or ladder to go to the To Do List, indicating the top edge is missing. As long as the stair or ladder remains on the To Do List, this error is not reported; however, if for some reason, the To Do List record is removed, then this problem is reported.
Possible Impacts
The stair or ladder will not recompute its size or position when its referenced geometry moves.
What You Should Do
Manually update the ladder or stair.
-
Open the model.
-
Select the ladder or stair.
-
On the ribbon, click Select Top Edge .
-
In a graphic view, select a new top edge for the stair or ladder.
-
Click Finish on the ribbon.