FBX is indeed the best format for importing models. But the error message that you're getting seems to indicate some missing module on your PC. Have you tried it on another one?

yes, same error on my netbook, on my notebook, and on the PC of my wife ._.

Can you upload the FBX model with textures? I'll check if the problem is related to the model.

It was necessary to install the "Security Update for ATL Package
Microsoft Visual C Redistributable 2005 SP1 (x86) "(= version 8.0.59193).
that was problem on my pc and windows 7 pro , and when I try to import it from my desktop there was same error like your , but when copy that model to another partition med import without problem .

i installed the sp1 update
and i tried to import from different locations:
c:
d:
d:/models
desktop

same error

I can import your scifi_walls model with the FBX 2010 importer on all PCs that I tried. So it's indeed something PC specific.

Can you contact Support and give them your PC specifications? They'll send you some test files for finding out what's missing.

Okay - got it to work now.. some bad data in the c++ runtime...

But.. a direct fbx support would be good - wether the importer is working or not. Cause many users with 3dsmax, c4d, blender, wings3d, sketchup..etc...
are working with X, FBX or OBJ..
And a direct support would be better than wasting time and nerves with the MED importer, just to bring those files into the very old mdl format

See other Engines like ogre3D or irrlicht, wich are completely for free, but with FBX, 3ds or OBJ support.. Why is it possible for those free Engines, but not for a up to 671€ 3D Game Studio?

Another cool thing when working directly with FBX:
LOTS of artists. YOu gather a team, some cool 3d artists and you only want the output as FBX. Thats a perfect situation, as their tools can handle this. Putting it into mdl might cause problems/waste time.

Esper: There are many good reasons why 3D engines normally don't use a data exchange format like FBX, 3DS, or OBJ for their models, but a special model format, such as MDL.

I guess you already learned one of them: If there are any FBX import problems, you want them to happen during game development, and not during gameplay on your end users' PCs.

Other reasons why a proprietary model format like MDL is superior to FBX: It loads much faster, has less overhead, needs no import library, and has more features such as LOD stages and surface shaders.