I've not touched 3d for a good decade now — but If I remember correctly — the Obj specification does not support animation. Try a different format and convert it to md3.

i am using obj files series. 001 002 003... for each frame. it is well known way to exchange animated 3d between apps.

I always thought animated models were not possible in q3 maps since everything gets converted to bsp geometry. Is it not possible for you to achieve what you want using a func_rotating?

what i need is a human figure walking the hallway in a loop. so maybe i should use player or monster entity. but motion capture walk looks better as vertex animation of a model with static origin point. thats why i tried use misc_model. it does not have to be iinteligent or interactive, just walk all the same path.
now i hear now and there it is imposible in q3. although i checked out default entity baseq3/models/mapmodels/bitch/fembot.md3 it moves up and down. how it is made? is it some scripting to it?