Ubuntu 11.04 bricscad for linux 29345_V11.3.16. won't run

On Ubuntu 11.04 bricscad for linux 29345_V11.3.16. won't run. In the command line it gives error :

bricscad: nv50_push.c:290: nv50_push_elements_instanced: Assertion `0' failed.

ubuntu 11.04

kernel 2.6.38-11-generic-pae (32bit)

nvidia-common 0.2.30.1