"mesh file not found" error while charging a track with RBR

[zaxxon]

[SOLVED] "mesh file not found" error while charging a track with RBR

I have created an object (two versions of the object) and imported it in an XPack
http://www.mediafire.com/file/jj47oj4b7s8d0nv/pastorcita.zip

BTB opens the XPack and I can export the track for RBR without problems.
When charging the track with RBR I get the message below
(and the object disappears from the track)

Any ideas on how can I solve this issue?

 

[zaxxon]

I have solved the problem.
I worked a little bit more on the object's mesh, debugging it (removing unnecessary faces) and now it works.
I suppose there was some kind of erroneus faces BTB didn't like.