I got a message to replace my magenta ink cartridge. I thought it was odd because I had replaced it a short time ago. There appeared to be plenty of ink in it but I went ahead and replaced it anyway. Cleaned the head as instructed and tried again. Got the same message. The cartridge appeared OK but just in case I opened another one and inserted it. Got the same message. For some reason the printer is not being fed magenta ink. It is flowing OK from the cartridge. I have cleaned and recleaned the heads. Any ideas?