Hydratec Inc.

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Revit Based HydraCAD (Ribbon/Toolbar/Location)

Button: Add Device Function: Select Error Type: Revit could not complete the external command.


Command failure for External Command... Revit could not complete the external command



While attempting to create the selected device, a problem with the geometry occurred causing the fitting creation to cease which placed a corrupt temporary dwg file that could not be deleted due to the routine failing to complete its process.


Using “File Explorer” browse to C:\HES\Temp and delete the dwg file that matches the part # you were trying to select. Replace C: with a different drive letter depending on where you have Hydratec for Revit software installed. 

It is okay to delete all the “Part number” dwg files from this folder if desired


NOTE: If you are recieving this error, and your Part # does not match the one stated to be giving this error in the HydraCARD, please contact Revit support at revitsupport@hydracad.com with..

  1. The part number of the Valve that is giving you the error (Pictured below circled in red)
  2. If possible, a picture of the error it gives you.

Thank you.

Updated: Jan. 9, 2024, 4:19 p.m. Created: Nov. 5, 2021, 7:50 p.m.