Thank you kcstudio for responding.
In the meantime I figured out why I was getting this error. Although I don't understand why I even got this.
The existing 8 tracks I imported with Import from the desktop into this WaveBurner project. Working in Regions tab all the time I did not realize that when I switched to the CD tracks tab there was nothing there. No regions and title list. So I made a new project and imported the audio files again making sure the CD tracks tab was selected refore. After that regions and listings were there both in regiones and CD tracks tab. I think Import
should have taken care of that. I don't get it why there was nothing when I clicked the CD track tab.