Dishwasher "CUP OPEN" Display
This display indicates to you that the detergent cup has not been closed. It's a reminder to add detergent and latch the cup closed. When the problem occurs, the cycle will not start, but you can override by pressing the start pad again without opening the door.
If this problem persists, contact service. If you would like to schedule a service appointment, please contact GE Appliance Service or schedule a service appointment on-line.