System.NullReferenceException: Object reference not set to an instance of an object

Not sure what is going on with this error, but I get it randomly. It happens when opening a new script or an existing script. It isn’t the same script but any. I fix it by closing Revit and Dynamo, then reopening. Sometimes doing that a couple of times. This is also happing to another user. They have noticed that when they use the firms’ standard template it happens, could just be a coincidence. It seems to be random for me.



Let me know if I need to clarify anything.

Helix toolkit is the 3d Dynamo preview, so try to disable the preview in first instance.
Then, I think Dynamo team should check this

Any updates about this issue? I have the same problem


@sergio_ramirezr what version of Dynamo/Revit do you see this in?

I am having the same issue.

It happens when you let dynamo open and computer goes in standby mode for a long time. Sometimes I keep script open to continue on next day and I see that message.