This error message indicates that the printer cannot determine which cartridge is causing the error. Follow the steps below to solve the problem. Remove the color cartridge from the left stall (which has a blue latch) and refasten the latch. Leave the other cartridge in place. Close the printer, wait 10 to 15 seconds, then look at the LCD display. If the LCD display reads "Insert Color Cartridge in Left Stall," the color cartridge may be causing the problem. Follow the steps below: -Clean the color cartridge contacts. -Reinsert the color cartridge into the carriage and close the blue latch. -Close the printer and wait 10 to 15 seconds. BTW, the cleaning instructions say to avoid the nozzles. For the most part this is true, they are extremely small, and can clog easily. If you have a lint free cloth, dampen the cloth with distilled water, and gently wipe the nozzles, this can remove any ink build up, and will also wick up ink from the nozzles, helping to clear them. But only do this if you notice streaking...