[BUG] Object reference not set to an instance of an object.

DOMimages

I have this error appearing when I open my file. It appears multiple times for various objects and I see no RN preview in the viewport.

It seems like there is some trouble with drawing pointclouds to the screen

Scene is rather heavy with several Ecosystems and many scattered objects.
The only thing I did which might have caused this is I run _Purge. Is that possible, how can I fix this problem?

D-W

DOMimages Huh... That's an interesting issue, well yes _Purge could potentially be the origin of this issue I always recommend having all used blocks somewhere hidden but inside the scene, though RN makes a copy on the fly and puts it into the document for a second, while _Purge is called, and right after it deletes it. Maybe objects used as a whole were too big and RN couldn't pack them as fast and Rhino kicked in - though actually command listeners are hooked via Rhino's own API so it is weird that it could omit that in this particular case... Unless you also deleted some on your own on the fly and RN lost track of the InstanceDefinition table in RhinoDoc.

However glad to see you worked it out!

DOMimages

Ok, I found one Ecosystem which was not working removed it ant all went back to normal. In any case this shouldn't have happened in the first place so I'll leave this post for reference

D-W

Ah, if you want me to investigate closely this issue, please leave info on the Rhino version and build.