When rendering MPEG2, I suddenly get an "Unknown error" message in Vegas 8 with Raylight Ultra, all MXF and JPG video files. I have had no problems before this project and its short and light. (FX-wise). I'm using MPEG 2 template with DVD Architect 24-p NTSC Widescreen, modoified for best video quality and two-pass. It won't even start rendering, instant error. I checked Dynamic RAM and lowered the setting, made sure Raylight Ultra was configured, I'm stumped.