[Soapy]

You use the Mat. Change Kit: Dragon Remains.
You do not have any items compatible with this material changing kit.

My inventory is full of items. I haven't been able to test any other material, but these don't seem to work at all.

[Neus]

Are the items your inventory is full of made out of ore?

[Snake]

Dragon Remains is the only material that is not working. I think it is waiting for stuff like Narcus, Ensui or Gigantys, as it can't see any other kind of weapon as 'valid' (supposition). The rest (atleast normal/common ore wise) are all fine.

[Neus]

This has been corrected.