Updating Content To Trainz 12

[dej]

How Would I Go About fixing these errors to allow this older content to work in trs12?

Error: Attachment point 'a.corona7' in '6' must be found in mesh 'gp38_body\gp38.im'.
Error: The attachment point 'a.corona7' must belong to the parent mesh of the effect (mesh=gp38_body\gp38.im).

By the way I'm working with a GP38 from RRmods

Here is the specific Kuid
GP38 NS,<kuid:55290:1100206>