We're probably using a part of OpenGL that isn't supported by your graphics hardware. What kind of graphics card do you have?
You may be able to work around this error by disabling (on the View menu), level of detail, hardware skinning, and vertex buffers.
Also, I find that when I use VMWare, the VMWare graphics driver causes PyroSim to crash when using the Show as People option. Are you using VMWare?
- Charlie