Try changing the redirect system from OpenGL to Direct3X or from Direct3X to OpenGL.
Also, try checking th practicle folder for any _0, _1, _2 or so.
Example.
aura_0, aura_1, aura_2 and so on.
Also, go to Main Disk >>> FeralHeart >>> media >>> terrains >>> You'reMapName and click on it, then check if the mesh or object file is in there. If it is not, try re-making the map and exporting then trying to check if the file is there.
Good luck! ^.^