How To Fix MSGSERVER091 - No port is open for the external binding program

SAP Error Message - Details

• Message type: E = Error

• Message class: MSGSERVER - Messages for Message Server

• Message number: 091

• Message text: No port is open for the external binding program

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message MSGSERVER091 - No port is open for the external binding program ?

  The SAP error message MSGSERVER091 indicates that there is no port open for the external binding program. This typically occurs in the context of SAP's message server when it is unable to establish a connection to the external program or service due to port configuration issues.
  Cause:
  
  Port Configuration: The specified port for the external binding program is not open or is incorrectly configured in the SAP system.
  Firewall Issues: A firewall may be blocking the port that the external binding program is trying to use.
  Service Not Running: The external service or program that the SAP system is trying to connect to may not be running.
  Network Issues: There may be network connectivity issues preventing access to the specified port.
  Incorrect Parameters: The parameters for the external binding program may be incorrectly set in the SAP configuration.
  
  Solution:
  
  
  Check Port Configuration:
  
  Verify the port settings in the SAP profile parameters. Look for parameters like ms/server_port_<n> where <n> is the instance number.
  Ensure that the port is correctly defined and matches the configuration of the external binding program.
  
  
  
  Open the Port:
  
  If the port is closed, you may need to open it in your operating system's firewall settings or any network firewalls that may be in place.
  
  
  
  Verify External Service:
  
  Ensure that the external binding program or service is running and is configured to listen on the correct port.
  
  
  
  Check Network Connectivity:
  
  Use tools like ping or telnet to check if the SAP system can reach the external service on the specified port.
  
  
  
  Review SAP Logs:
  
  Check the SAP logs for any additional error messages or warnings that may provide more context about the issue.
  
  
  
  Restart Services:
  
  Sometimes, simply restarting the SAP message server or the external service can resolve transient issues.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or support notes for any specific configurations or known issues related to the external binding program you are using.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to the error message.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  System Administration: Ensure that you have the necessary permissions to modify system settings and configurations.
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance.