This error appears when the cash area is insufficient. There may be a case where the assigned work area varies with the I/F mode and I/F mode setting does not agree or decoding of a command is impossible. Then the work area is consumed up, thus memory runs short. In such a case, this message is displayed and the printer stops operating.
1. Check I/F mode. 2. Installing Firmware. 3. Replace the C593 MAIN Board.