thank you for the answer …
I did the wheels rotation by armature and it looks good in blender but I cant play it in my game {animation channels are empty or null , I dont know why} but I can play the wheelsRotation animChannel in jme sdk …
and also the ogre xml plugin export it to separate files But I want just mesh.xml and one material file …
this is my model , can you look at it and tell me what’s wrong in it ?