How To Fix PO452 - (SAP)LPD was started, but connection not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: PO - Spooler message

• Message number: 452

• Message text: (SAP)LPD was started, but connection not possible

What causes this issue?

An SAPLPD was started for local printing but no connection could be
established.

System Response

The output request is set to "error".

How to fix this error?

You may have manually closed the SAPLPD too quickly or there may be
problems with the network. Restarting the host may help.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message PO452 - (SAP)LPD was started, but connection not possible ?

  The SAP error message PO452 indicates that the LPD (Line Printer Daemon) was started, but a connection to the printer could not be established. This error typically occurs in the context of printing from SAP systems to network printers.
  Causes:
  
  Network Issues: There may be network connectivity problems between the SAP system and the printer.
  Printer Configuration: The printer may not be correctly configured in the SAP system or may not be set up properly on the network.
  LPD Service Issues: The LPD service on the server may not be running or may be misconfigured.
  Firewall Restrictions: Firewalls may be blocking the necessary ports for LPD communication.
  Incorrect Printer Settings: The printer settings in SAP (such as the device type or output device configuration) may be incorrect.
  
  Solutions:
  
  
  Check Network Connectivity:
  
  Ensure that the SAP server can reach the printer's IP address. You can use tools like ping to test connectivity.
  Verify that the printer is powered on and connected to the network.
  
  
  
  Verify Printer Configuration in SAP:
  
  Go to transaction code SPAD (Spool Administration) in SAP.
  Check the configuration of the output device associated with the printer. Ensure that the device type and other settings are correct.
  
  
  
  Check LPD Service:
  
  Ensure that the LPD service is running on the server where the printer is hosted. You may need to restart the service if it is not running.
  
  
  
  Firewall Settings:
  
  Check the firewall settings on both the SAP server and the printer server to ensure that the necessary ports (usually TCP port 515 for LPD) are open.
  
  
  
  Test Printing:
  
  Try printing a test page from the printer's web interface (if available) to ensure that the printer is functioning correctly.
  You can also try printing from another application to see if the issue is specific to SAP.
  
  
  
  Review SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  
  
  Related Information:
  
  LPD Protocol: LPD is a network printing protocol used to send print jobs to printers over a network. Understanding how LPD works can help in troubleshooting.
  SAP Spool Administration: Familiarity with transaction SPAD is essential for managing printers and spool requests in SAP.
  System Logs: Check system logs for any additional error messages that may provide more context about the issue.
  
  If the problem persists after trying the above solutions, it may be necessary to involve your network or system administrator for further investigation.