The printer is not ready to print the job. Check at your printers display if you get the message ready. There is a connection problem. Check your USB connection. Remove the USB cable and put it again. There is a communication error between your Texjet and your computer. Restart the printer and the computer to ensure that all pending jobs have been deleted. Never use a long USB cable or switch boxes or hubs with big load of traffic. Make sure always to stop your print job in the correct way without leaving any print jobs in the spooler.