I just loaded up a pre 2017.04 project.  The project was created with 2017.03.  The piece has 27 tracks and only the 1st ten are visible in PRV filter.  I've tried turning auto lock on and off.  The tracks and data for the other tracks can still be seen in console view.  What am I missing?
 
Thanks,
 
Aric

Are the missing tracks in a collapsed folder or are they marked as hidden in the Track View?  The new PRV won't display tracks that are hidden using the Track Manager or tracks that are in a collapsed folder.
 
--Ron

Press H

None of the tracks are hidden.  The woodwinds tracks are in a folder and are visible in PRV.  The brass tracks are in a folder but are not visible in PRV.  Both folders are not collapsed.  Any other thoughts? 

OK, I got it figured out.  I had to remove all of my tracks from their folders, delete the folders and create new ones. 

I had this happen with a current project but if I change layouts they come back.  On initial load tracks 6-10 would vanish from track pane but could still be heard.