In an assembly schedule view, indicates if totals are calculated for all assembly instances of the same type or only for a single instance. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2013 
Syntax
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Field Value
True if totals are calculated for all assembly instances. False if totals are calculated for one instance.Exceptions
| Exception | Condition | 
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| Autodesk.Revit.Exceptions InvalidOperationException | When setting this property: This ScheduleField cannot be totaled by assembly type. -or- When setting this property: Totals are not enabled for this ScheduleField. |