How To Fix /IWFND/CM_MGW001 - The RFC call was not successful because of communication failure '&1'

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWFND/CM_MGW -

• Message number: 001

• Message text: The RFC call was not successful because of communication failure '&1'

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWFND/CM_MGW001 - The RFC call was not successful because of communication failure '&1' ?

  The SAP error message /IWFND/CM_MGW001 indicates that there was a communication failure during an RFC (Remote Function Call) operation. This error typically arises in the context of SAP Gateway services when there is an issue with the backend system communication.
  Causes:
  
  Network Issues: There may be network connectivity problems between the SAP Gateway and the backend system.
  RFC Destination Configuration: The RFC destination may not be configured correctly in the SAP system. This includes incorrect connection parameters, such as the hostname, system number, or client.
  Backend System Down: The backend system that the Gateway is trying to reach may be down or not responding.
  Authorization Issues: The user credentials used for the RFC call may not have the necessary authorizations to access the backend system.
  Firewall Restrictions: Firewalls or security settings may be blocking the communication between the systems.
  Timeout Settings: The timeout settings for the RFC call may be too short, causing the call to fail before it can complete.
  
  Solutions:
  
  Check Network Connectivity: Ensure that there is proper network connectivity between the SAP Gateway and the backend system. You can use tools like ping or traceroute to diagnose network issues.
  Verify RFC Destination:
  
  Go to transaction SM59 in the SAP GUI.
  Check the configuration of the RFC destination being used. Ensure that the connection parameters (like hostname, system number, and client) are correct.
  Test the connection using the "Test Connection" button in the RFC destination configuration.
  
  
  Check Backend System Status: Ensure that the backend system is up and running. You can check the system logs or use transaction SM51 to see the status of application servers.
  Review Authorizations: Ensure that the user credentials used for the RFC call have the necessary authorizations to access the backend system.
  Firewall and Security Settings: Check if there are any firewall rules or security settings that might be blocking the communication. Work with your network/security team to ensure that the necessary ports are open.
  Adjust Timeout Settings: If the RFC call is timing out, consider increasing the timeout settings in the RFC destination configuration.
  
  Related Information:
  
  
  Transaction Codes:
  
  SM59: To manage and test RFC destinations.
  SM21: To check system logs for any related error messages.
  ST22: To check for dumps that might provide more context on the error.
  SICF: To check the status of the ICF services.
  
  
  
  SAP Notes: Check for any relevant SAP Notes that might address specific issues related to this error message. You can search for notes in the SAP Support Portal.
  
  
  Logs and Traces: Enable traces for the RFC calls to gather more detailed information about the failure. This can be done using transaction ST01 (Authorization Trace) or SM50 (Process Overview) to monitor active processes.
  
  
  By following these steps, you should be able to diagnose and resolve the communication failure indicated by the error message /IWFND/CM_MGW001.