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.

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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