Noel:

Thanks for your suggestion but............
I have no BIAB files loaded. I tried changing the track type on a dozen or so unused tracks. Same problem.
But, if I create a new file with no tracks recorded yet I am able to change track type on as many tracks as I want.
I am going to record a couple of tracks on this new file and see if I can change the track type.

Further suggestions would be appreciated........

thankjs,
Gregg