Arms models not allowed by Gmad?

OK, so I have a new player model I’m working on, and I get this as it’s running through Gmad -

The models in question are first person arms.
I’ve thoroughly tested them ingame, and they work great and do what they should, too.
I’ve been able to upload them before with similar filenames on other player models, in the same directory… but this time it’s giving me trouble. Was this changed in a recent update? And if so, what needs to be done for these files to be allowed?

Thanks.

You forgot to put them into the models/ folder like the rest of the models.