how to deal with "no phong material selected"problem?

[Old Pocket Watch MH]

I'm trying to add a model to HOI4.
I didn't find an "apply phong shader" button

and even though I do have a phong material with shader,the problem didn't be sovled

 

[K-vald]

Did you select the shader material before clicking the "Add shader attr." button? It just gives the selected Maya shader a set of pre-scripted attributes where you choose the type of shader the mesh should have in game.

 

[Old Pocket Watch MH]

Did you select the shader material before clicking the "Add shader attr." button? It just gives the selected Maya shader a set of pre-scripted attributes where you choose the type of shader the mesh should have in game.

Many thanks! I get it!