In order to attempt to defeat those like you and me who use compatible cheap cartridges, some printer manufacturers continually change the systems used in their ink cartridge chips in an attempt to defeat the compatible manufacturers. Over the years I have acquired my compatible cartridges from
www.tonezoneuk.com. I fund that they tend to keep up to date with the latest tricks and traps of the computer manufacturers thus I tend to give them a ring before comtemplating any new purchase. I WILL NOT pay these ridiculous prices for ink jet ink when BS inks are available, reasonably priced, from a number of suppliers - and I have always obtained excellent results with my photographic prints. It currently costs me about 50p per cartridge to refill my Canon photo printer.
P.P.