Just a quick question on fixing those errors that pop up during file import.   What is the best way to fix them?

I find a lot of radiused corners end up wrong or completely missing.

What is the best (and easiest) way to fix this?  I've had only mixed success with the import diagnostics.  Some of those corners it keeps telling me there's a failing face, which I can't seem to delete.  Face delete/patch doesn't seem to work.