Are you sure there was a command /cl_primitives? I dont think so
Do /r_primitives 0 in your console, my friend.
Perhaps you cant do that. So go to...
C:\Program Files\Wolfenstein - Enemy Territory\etmain\profiles\AfeeRoumee(your name of profile)
or
C:\Program Files\Wolfenstein - Enemy Territory\jaymod\profiles\AfeeRoumee(your name of profile)
[depend where you use command /r_primitives 15. On Jaymod or somewhereelse]...and delete your 'etconfig' file. The game create new one with /r_primitives 0.
And next time dont use commands what you dont know
Fragg ya later, mate.
Regards,
Afee de Roumee.