In using Vegas 8.0a I have a project that crashes. I am using Waves NPP 5 with their IR-L reverb and Super Double-tap activated on five tracks. The file plays fine but when I mute one or several tracks that have these plug-ins, I get an error message. If I unmute the tracks, the error message goes away but the project freezes. I tried opening another file that has these same plugins and don't get the error message. I have a screen shot of the error message that I emailed to Sony Tech Support. Has anyone else experienced this or have any ideas? Thanks, Bob K.