These parts are supposed to be molds, bu they're just the original part.
I found the problem. The molds are still connected to the original file. I deleted the molds in the original file and thought they would stay in the mold files. There's no assembly. Just part files.
Are you editing the assembly? Both of these files were created in the context of another assembly, see the message I get when trying to open.
It still does the same thing in this assembly file
Eric, I know it's a PITA but we need the part files too. You should have at least two of them and your assembly file. Happy to try and help though ...
Fair enough ... Glad you got it figured out.
We don't really do any surfacing work in my business so we go about them a different way (Using the "Cavity" feature) but I made up a quick file for your reference while I was waiting on your models. They're in SW 2017 if you wanted to see the way we do the majority of our molds. Just for your reference ...
Retrieving data ...