CoD 2 moddeling with Blender 2.61 cant export models

[IJimmyI]

Hello,
I am currently working on a new map for CoD2. For that I downloaded Blender 2.61 and installed the Blender-CoD Addon v0.3.5. Until then everything works. But if I want to export the model then as xModel gives me this error message. What can I do about it or what am I doing wrong?
Please help. :(

https://i.ibb.co/990CLRH/Screenshot-2.png

[SE2Dev]

I'm not entirely certain, but it could be that Blender 2.61 doesn't have the tessface API. That version of the plugin should still work with 2.79 though.

[CoDEmanX]

Yeah, I believe they added it in v2.63.