I am doing some meshing for Fallout 3/New Vegas. For a while I would make the mesh in Blender 2.71 and then I would try to open up the same .blend mesh in Blender 2.49b (since that is what making meshes for Fallout 3/New Vegas limits me to) to add in the collision meshes as well as export it to a NIF file, and make whatever changes I needed to in Nifskope.
When opening the mesh in Blender 2.49b, I get the message depicted below, and when I would hit okay and the file would open. Only the wireframe of the mesh would display rather than the actual mesh that should normally show up that's a shaded object.
I know 2.49b is old but is there something I could do with meshes edited in Blender 2.71 to make them usable in an older version of blender?