Greetings everyone, We decided to make the changeover from IJC256 to IJC257. The Application Bulletin here seems to indicate that we don't need to perform the "short flush," which is a process managed by the printer. Instead, my understanding is that it just needs to have a "manual purge"--which is to perform 14 long purges under the maintenance drawer. So, when I insert the new ink bags, the computer interface displays a prompt stating that "The ink flush procedure is required before a different type of ink can be used." After I replace all four ink bags with the new ink, and perform two long purges, the prompt is still present and I can not get the ink reservoirs to fill. Does anyone have experience with this? It seems like I should be able to cancel the short flush prompt, but it persists and the persistence of that prompt prevents me from doing the manual purge, unless I'm missing something. I've been on the phone with Canon techs back and forth and have been making no progress yet. Hoping this community can! Thanks in advance.