Mesh Swap needs to be non-case-sensitive.

[Igrium]

I'm unsure of exactly when this happened, but Mineways now exports materials with upper-case names. This breaks Mesh Swap because Mesh Swap expects materials with lower-case names, and it's annoying to have to manually change all of them.

[TheDuckCow]

Thanks for sharing, I'll work on generalizing this. For my investigations, can you share your Mineways export settings (e.g. using tiles or combined textures, and are sub material names selected?)

[Igrium]

Here you go:

[TheDuckCow]

Perfect, thanks. For the record, if you tried selecting the "export tiles for textures to directory" setting, MeshSwap likely would work better. And even if you don't want to do that, will also help if you tick the box "split by block type". Though I recognize that doesn't totally fix your issue here (hence I marked as a bug), generally both of these settings will make meshswap (and animate textures, and swap texture-pack) work much better.

[TheDuckCow]

Marking as completed, as I have validated this works in my dev branch - will be included in the v3.2.4 release!