As a test I have tried to import a obj, it creates the mesh then says this after it crashes in the skyline.log.
any idea.
18:14:50: Mesh: Loading planet_Planet01_planet_obj.mesh.
18:14:50: WARNING: planet_Planet01_planet_obj.mesh is an older format ([MeshSerializer_v1.8]); you should upgrade it as soon as possible using the OgreMeshTool tool.
A export of the same mesh brought into skyline..
From the tech support file
#&127,255,127:Your version of Skyline is up-to-date!
Generating Shader for: Grass_00
Generating Shader for: Grass_00
Generating Shader for: Grass_00
materialName: PlanetMat
materialName: PlanetMat
Upgrading and converting mesh to v2 format: test_Planet02_planet_obj.mesh