There are some cases when the LCD shows this message. Follow the solution suitable for your case.

• Cause 1: The machine's memory is full.
  
  Press Stop/Exit and wait until the other operations in progress finish and then try again.
  
  

  If the Out of Memory message appears while scanning a document, press Stop/Exit to cancel or Black (Mono) Start to send the scanned pages.
  If more than one page has been scanned, press Black (Mono) Start to send the portion that is in the machine's memory.

  
  
  
• Cause 2: The memory card or USB Flash memory drive you are using does not have enough free space to scan the document.
  (For applicable machines)
  
  Delete unused files from your memory card or USB Flash memory drive to make some free space and then try again.