How To Fix PO537 - Unable to reach the remote host spool system

SAP Error Message - Details

• Message type: E = Error

• Message class: PO - Spooler message

• Message number: 537

• Message text: Unable to reach the remote host spool system

What causes this issue?

The SAP spool system cannot connect to the host spool system to which
the requests for this output device are to be sent.

System Response

Requests sent to this output device cannot be proccessed. They remain
in status <ZK>Waiting</>.

How to fix this error?

This message usually means that the host you specified under
<ZK>destination host </>(<ZK>Host spool access method</> tab) is either
down, or the transfer program SAPLPD (or LPD) is not running on the
host.

Procedure for System Administrators

Check to determine whether the destination host is on, or whether
SAPLPD (or LPD) is running.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message PO537 - Unable to reach the remote host spool system ?

  The SAP error message PO537, which states "Unable to reach the remote host spool system," typically indicates a communication issue between the SAP system and the remote spool server. This can occur in scenarios where printing is configured to be handled by a remote spool server rather than the local system.
  Causes:
  
  Network Issues: There may be network connectivity problems between the SAP application server and the remote spool server.
  Configuration Errors: The configuration settings for the remote spool server may be incorrect or incomplete.
  Spool Server Down: The remote spool server may be down or not running.
  Firewall Restrictions: Firewalls or security settings may be blocking the communication between the SAP system and the remote spool server.
  Incorrect Hostname/IP: The hostname or IP address of the remote spool server may be incorrect in the configuration.
  Port Issues: The port used for communication may be blocked or not open.
  
  Solutions:
  
  
  Check Network Connectivity:
  
  Use tools like ping or traceroute to verify that the SAP system can reach the remote spool server.
  Ensure that there are no network outages or issues.
  
  
  
  Verify Configuration:
  
  Go to transaction SPAD in SAP and check the configuration of the output device that is set to use the remote spool server.
  Ensure that the hostname/IP address and port number are correctly configured.
  
  
  
  Check Spool Server Status:
  
  Ensure that the remote spool server is up and running. You may need to restart the spool server if it is down.
  
  
  
  Firewall and Security Settings:
  
  Check firewall settings to ensure that the necessary ports for communication are open.
  Consult with your network/security team if needed.
  
  
  
  Test Connection:
  
  Use the RFC connection test to check if the SAP system can connect to the remote spool server. You can do this in transaction SM59 by testing the RFC destination configured for the spool server.
  
  
  
  Review Logs:
  
  Check the SAP system logs (transaction SM21) and the spool server logs for any error messages that might provide more context on the issue.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or notes related to spool server configuration for any additional troubleshooting steps.
  
  
  
  Related Information:
  
  Transaction Codes:
  
  SPAD: Spool Administration
  SM59: RFC Destinations
  SM21: System Log
  
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to spool server communication.
  System Administration: Ensure that the system administrators are aware of the issue and can assist with network or server-related problems.
  
  By following these steps, you should be able to diagnose and resolve the PO537 error in your SAP environment.