Hi Eric,

> Opening the drawing in MoI and saving the drawing with
> MoI corrected the problem when reopened in Rhino. I
> don't know what went on there but thanks, Michael.

It most likely would be some edges in a trim loop that did not quite touch each other end-to-end very closely. MoI will do some stuff to heal those kinds of gaps up when it reads in a file.

I'm glad it was able to help out!

- Michael