Thanks, Fred.
I had saved the settings using Qimage's File/Save command and the files show up in the Qimage File/Recall/Printer Setup screen. I've used this process for 6-7 years on an HP B9180 without experiencing the problem. Perhaps something quirky with the IPF6400 Driver?
The printer driver may have been updated over the years and the one you are using now may not be compatible with the old saved setups. I would suggest using "Help", "Reset Printer Settings" and then use printer setup to recreate the setups manually. That should ensure that all the saved setups are compatible with the current printer driver version you are using. Try one as an example and make sure it (re)loads properly and if so, you'll know you need to remake the other setups as well. I would not recommend loading old setups before you update them, however, since loading incompatible data might cause problems: hence the recommendation to do the "Reset Printer Settings" to get any old data out of there first.
Regards,
Mike