Engine Error vertex buffer

This Crash happend only 1 time
https://www.team-underground.net/public/2012-09-16_00023.jpg
https://www.team-underground.net/public/Black%20Mesa%20bug.JPG

Too many verts for a dynamic vertex buffer 42844>32768 Tell a programmer to up VERTEX_BUFFER_SIZE.

Edit: After a second try i have no error…

My resolution is 1280x960

Im not sure, but try to change resolution to smallest

Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.