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

PO537 - Overview

• 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.

PO537 - Details

• 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