Hydratec Inc.

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Revit HydraLIST (Ribbon)

Button: Auto Stocklist Error Type: Command Failure for External Command

Description:

Revit could not complete the external command... System.NullReferenceException

Solutions:

Cause:

This error can be caused by a stop sign trying to reference a fitting that no longer exists. 

In this example, a fitting that the stop sign was associated with got removed or changed in some way, so it was no longer functioning properly. 

Solution:

Use the Delete Stop Signs button to remove one or all stop signs you think might be creating this error, and replace them. 

The stocklist should start as normal once they're fixed. 

Updated: Jan. 16, 2023, 4:15 p.m. Created: Jan. 16, 2023, 4:15 p.m.