Yes, that kind of thing is the issue. At least the yellow error message is helpful. I will just have to test all the graphs for things like that.
There was also a worse crash, I think caused by Bruteforce Get Parameter Value by Name from Bakery in a very large RVT. I tried to fix the node and its sub nodes but just ended up deleting the node and doing it a different way.
Had some other issues, too, and that was just one graph that had previously been working.
It is all fine, and a part of the Dynamo experience, just unexpected.