Thanks for the replies! I'm sure that Ernst has it in the use of the custom media presets.
I did not know that Hana papers (at least) have batch numbers and this is a very useful bit of information!
So taking the hint from Ernst, I went to work with the “Manage Papers” section of the HP color center, any time I try to open the add, delete or update papers, the interface hangs and after a while tells me that the device is unavailable. I've tried restarting the printer, restarting the printer and then restarting the computer, and get the same result. The other parts of the Color Center appear to be working fine.
So…….i’m not sure what to do next. Do I reinstall the HP Color Center software? If I do, does this cause me to lose the presets and profiles in place at this point of time?