BuiltInFailures.StairRampFailures.MultistoryStairsHideTopLevelParameter
Property
Description:
You have set the stair's multistory top level to None, and Revit will remove this parameter, if you want to create a multistory stair, please use Create Multistory Stair feature.
You have set the stair's multistory top level to None, and Revit will remove this parameter, if you want to create a multistory stair, please use Create Multistory Stair feature.