>>33300
if it is 3d bit software this limitation is totally expected.

And looks like it cannot be fixed if we believe that guy:

There is no 64-bit version of the Source 1 version of SFM.

The Source 2 version of SFM (built into the DOTA2 tools) is 64-bit only, but has many many drawbacks (like being *only* compatible with Source 2 models, which basically means only DOTA 2 models).
The problem is more that SFM is a bodged-together tool that only works as well as Valve's animators needed to make trailers with. Although Valve have been very generous in releasing it for the public to use, we get it on a "no warranty" basis. It works well on some computer configurations - not so well on others.