Issue: 


Error occurs when ElumTools is initialized.


Solution: 


Typically this error is solved by a simple Revit reboot. Please try the following:


  1. Close all instances of Revit (if you have it opened).
  2. Open one instance of Revit. 
  3. Open the file you are trying to work on, without opening any other files. 
  4. Immediately try to perform an ElumTools command. 


Please contact Lighting Analysts Support if the problem persist.