Model doesnt decompile

[Crop plot]

So,I'm trying to decompile a model from l4d2 that replaces ellis to use it in sfm, but for some reason crowbar throws me this:

"Decompiling with Crowbar 0.74: "C:\Program Files (x86)\Steam\steamapps\common\Left 4 Dead 2\bin\3303373424\models\survivors\survivor_mechanic.mdl" ...

Decompiling "survivor_mechanic.mdl" ...
Model version 53 detected.
Reading MDL file header ...

... Decompiling with Crowbar 0.74: "C:\Program Files (x86)\Steam\steamapps\common\Left 4 Dead 2\bin\3303373424\models\survivors\survivor_mechanic.mdl" finished."

It does absolutely nothing (it just makes the empty folder, and after I tried changing some settings I just got the anims for some reason), which is weird because I tried with other survivor mods and it worked with 2/3, (I think the third one didnt decompile some parts of the models, just head and the animations).

pls elp

[乃ㄖ乃爪卂匚 Ü]

Some l4d2 models will not complie for some reasons, idk why.

[Stellar Biblioteca]

yeah every model with header 53 is failed to decompile for me too, anyone has insight for us?