How To Fix PO764 - Host printer (&1) unknown / was changed during output

SAP Error Message - Details

• Message type: E = Error

• Message class: PO - Spooler message

• Message number: 764

• Message text: Host printer (&1) unknown / was changed during output

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message PO764 - Host printer (&1) unknown / was changed during output ?

  The SAP error message PO764, which states "Host printer (&1) unknown / was changed during output," typically occurs when there is an issue with the printer configuration or the connection between the SAP system and the host printer. Here are the potential causes, solutions, and related information for this error:
  Causes:
  
  Printer Configuration Issues: The printer may not be correctly configured in the SAP system or may not exist in the system.
  Network Issues: There could be network connectivity problems between the SAP system and the printer.
  Printer Status: The printer may be offline, out of paper, or experiencing other hardware issues.
  Changes in Printer Settings: The printer settings may have been changed after the print job was initiated, leading to the error.
  Authorization Issues: The user may not have the necessary permissions to access the specified printer.
  
  Solutions:
  
  
  Check Printer Configuration:
  
  Go to transaction code SPAD (Spool Administration) in SAP.
  Verify that the printer is correctly configured and is listed as a valid output device.
  Ensure that the printer is assigned to the correct output type.
  
  
  
  Verify Printer Status:
  
  Check the physical printer to ensure it is powered on, connected, and has paper.
  Ensure that the printer is not in an error state (e.g., out of paper, jammed).
  
  
  
  Test Printer Connection:
  
  Use the SPAD transaction to test the connection to the printer.
  You can also try printing a test page from the SAP system to see if the issue persists.
  
  
  
  Check User Authorizations:
  
  Ensure that the user has the necessary authorizations to print to the specified printer.
  Check the user roles and profiles to confirm that printing permissions are granted.
  
  
  
  Review Output Device Settings:
  
  If the printer settings were changed, revert them to the previous configuration or update the settings in SAP accordingly.
  Ensure that the output device settings in the print program match the printer's capabilities.
  
  
  
  Reinitialize the Print Job:
  
  If the print job was interrupted, try reinitiating the print job after resolving any issues.
  
  
  
  Related Information:
  
  Transaction Codes:
  
  SPAD: Spool Administration
  SP01: Spool Request Overview
  SP02: User Spool Requests
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to printer errors.
  Documentation: Refer to SAP documentation for detailed information on configuring printers and troubleshooting printing issues.
  
  If the problem persists after trying the above solutions, it may be necessary to consult with your SAP Basis team or technical support for further assistance.