Thanks, I went through the whole thread, followed the suggested links and tried all the suggestions but no joy. I'm not sure why I'm having issues, I've installed DTLite and can run it outside GameEx without issue. I noticed when I run "Run Last Game" that the full path isn't present.. ie: "C:\Roms\Sega CD\Roms\Adventures Of Batman & Robin (USA)\Adventures Of Batman & Robin (USA).cue" just "Adventures Of Batman & Robin (USA).cue". So the command looks like Fusion.exe -scd -fullscreen "Adventures Of Batman & Robin (USA).cue" instead of having the full path. However my set up is consistent with my other fusion entries that work. My paths for all Fusion/Sega (Genesis,32x,Sega CD) Roms are .. C:\Roms\Sega 32X\Roms C:\Roms\Sega Genesis\Roms C:\Roms\Sega CD\Roms