Warning: Not Computed
Issue: This message displays for the Volume parameter in room tags and room schedules when you have not enabled volume computation.
Because volume computation may affect Revit performance, enable it only when you want to prepare and print schedules or other views that report volumes.
Solution: To compute room volumes, click Architecture tab
Room & Area panel drop-down
(Area and Volume Computations). On the Area and Volume Computations dialog, under Volume Computations, select Areas and Volumes.