Removes member forces defined for given position. 
   Namespace:   Autodesk.Revit.DB.Structure  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 16.0.0.0 (16.0.0.0) 
  Since:  2016 
Syntax
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Parameters
- start
 -  Type:  System Boolean  
Member Forces position on analytical model stick element. True for start, false for end.