Message
Stair or Ladder is missing its bottom supporting plane.
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 the inputs is missing (bottom plane), the stair or ladder is orphaned.
Possible Cause
Deleting the original bottom plane geometry causes the stair or ladder to go to the To Do List, indicating the bottom reference plane 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.
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Open the model.
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Select the ladder or stair.
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On the ribbon, click Select Bottom Plane .
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In a graphic view, select a new bottom plane for the stair or ladder.
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Click Finish on the ribbon.