Then I found a needed a version of the original V-Rack so as to be able to hear all instrument channels set to 2408 Main Outs 1&2 again. I loaded into the Chunks window an exactly identical V-Rack from another DP sequence file. Oh dear. When I un-enabled the first V-Rack (mixer outs) and then enabled the loaded V-Rack (2408 Main Outs only), all the output assignments in the Tracks window of my sequence chunk turned to italic and stopped connecting. - DP had lost sight of them.
I found I had to go through all the tracks again (about 100 of them) re-setting the outputs to where they should be, to turn the italic listing in the output column into a non-italic one.
What did I do wrong?
Do I need to be saving separate Bundle files by listing individual instruments so as to be able to manage these outputs? Is there a simple way to switch between outboard mixer-out allocations (via 24i/o) and all instrument etc. outputs going to a single stereo pair? Thanks for you help folks.