Dear scook, no, the effects rack is available, clicking on insert audio effect, Sonitus reverb, or Valhalla Room, nothing happens. But, I can insert Sonitus Equalizer. I am suspecting that maybe one of the Pro Channels have reverb, not allowing to use an other instance of reverb? But opening all Pro Channels, nothing shows up but the usulal EQ. Regardless, turned Workspace as you suggested, no change. Thanks a lot for your help.