This bug occurs on certain maps of all Vavoom games. It never happened with Vavoom on my older computer. Sometimes certain things in a map will not work and the console will show a continuous error message streaming in the hundreds per second: UpdateLevel: Player Overflow How do I stop it so I can just play normally?

Building full VIS data with glVIS should help.

Where can I get this program from?

What I meant to say was how do I properly use this program. I tried running it and it replaced the files but eh... nothing happened in game as I still get the player overflow crap running down the console.

Actually you are at least 3rd person who asked about it. See the topic here: <!-- m --><a class="postlink" href="http://vavoom-engine.com/forums/viewtopic.php?t=717">http://vavoom-engine.com/forums/viewtopic.php?t=717</a><!-- m -->