Command shows that door is open

What door or cover is the display showing that it is opened? I would look to see if there is any thing that looks broken on any one of the doors. They have on them little tabs that act as a inter lock device to close a switch. Also, look to see if all the doors close easy without forceing it. try to cheat the doors with a pen or a piece of paper to see which door is not closing. Most of the time a switch or sensor is behind a **** on the inside covers. I would start with retracing the last time you removed a paper jam.