MassInstanceUtils.RemoveMassLevelDataFromMassInstance
Description:
Delete the MassLevelData (Mass Floor) that associates a Level with a mass instance.
Delete the MassLevelData (Mass Floor) that associates a Level with a mass instance.
Remarks:
Alternatively, you could just delete the MassLevelData.
Alternatively, you could just delete the MassLevelData.
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The ElementId massInstanceId is not a mass instance. -or- The ElementId levelId is not a Level.
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A non-optional argument was null