System/NullReference Exception when updating drainage (SUDA) model, storm drain pipe inverts

Hi,

I'm trying to update a storm drain invert in a SUDA model and it won't allow me to and is crashing. It is giving me a "System.NullReferenceException"

I am trying to update it in the utility properties as I don't want it tied to the invert of the structure and it is causing a crash and will not update the element properties (3D model is not updated):

I then tried to "Synchronize Drawing" hoping that would help and I get this error:

Please advise.

Thanks!

Brian

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