SWBF2 Modding XSI ZE Tools error message: "Export Aborted"

[Optimus434]

Export aborted: "NoneType" object has no attribute "Red"
Material_1shirt is not  type of Phong or Lambert..

I have no idea whats causing this. I am trying to export a model in XSI Modtools to a .msh, and after days of painstaking work I finally got ZE Tools to work, but now this comes up and I have no idea what it means or how to go about fixing it. For anyone that has been modding this game before, does anyone know how to deal with this issue?

And yes I have installed Python with the corresponding pywin32, VS C++, and the newest version of the XSIZETools.