I have been using Jorge Rodriguez's great Polywunrapper for years, but the current version 4.4.0 is bringing up a dead shapes error nearly every time I open the UVW Unwrap modifier. It's pretty much everytime, whereas it did this rarely in previous versions.
I have to remove dead shapes with the maxscript command
polyop.collapseDeadStructs $
I'm going to ask the developer of PU, but is anyone else experiencing this, it's a bit of pain.