How To Fix ISLM_DI_GEN256 - Unable to get the Connection details from the RFC destination.

SAP Error Message - Details

• Message type: E = Error

• Message class: ISLM_DI_GEN - DI Messages

• Message number: 256

• Message text: Unable to get the Connection details from the RFC destination.

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 ISLM_DI_GEN256 - Unable to get the Connection details from the RFC destination. ?

  The SAP error message ISLM_DI_GEN256, which states "Unable to get the Connection details from the RFC destination," typically indicates an issue with the Remote Function Call (RFC) destination configuration in your SAP system. This error can occur in various scenarios, such as when trying to connect to an external system or when executing certain transactions that require RFC communication.
  Causes:
  
  
  Incorrect RFC Destination Configuration: The RFC destination may not be configured correctly in the SAP system. This includes incorrect parameters such as the target system's hostname, system number, client, user credentials, etc.
  
  
  Network Issues: There may be network connectivity issues between the SAP system and the target system. This could be due to firewall settings, network outages, or incorrect routing.
  
  
  Authorization Issues: The user credentials used in the RFC destination may not have the necessary authorizations to connect to the target system.
  
  
  SAP Gateway Issues: The SAP Gateway service may not be running or may be misconfigured, preventing the establishment of the RFC connection.
  
  
  System Configuration Changes: Recent changes in system configuration, such as updates or patches, may have affected the RFC destination settings.
  
  
  Solutions:
  
  
  Check RFC Destination Configuration:
  
  Go to transaction SM59 in the SAP GUI.
  Locate the relevant RFC destination and check its configuration.
  Ensure that the connection type, target host, system number, client, and user credentials are correct.
  
  
  
  Test the RFC Connection:
  
  In transaction SM59, select the RFC destination and use the "Test Connection" button to verify if the connection can be established successfully.
  If the test fails, review the error message for more details.
  
  
  
  Check Network Connectivity:
  
  Ensure that the SAP system can reach the target system over the network. You can use tools like ping or telnet to check connectivity.
  Verify that there are no firewall rules blocking the connection.
  
  
  
  Review User Authorizations:
  
  Ensure that the user specified in the RFC destination has the necessary authorizations to connect to the target system.
  Check the user’s roles and profiles to confirm that they have the required permissions.
  
  
  
  Check SAP Gateway:
  
  Ensure that the SAP Gateway service is running. You can check this in transaction SMGW.
  If there are issues with the gateway, restart the service or check the logs for errors.
  
  
  
  Review System Logs:
  
  Check the system logs (transaction SM21) for any related error messages that might provide additional context for the issue.
  
  
  
  Consult Documentation:
  
  Refer to SAP Notes and documentation for any known issues or additional troubleshooting steps related to the specific version of SAP you are using.
  
  
  
  Related Information:
  
  Transaction Codes: 
  
  SM59 - RFC Destinations
  SMGW - Gateway Monitor
  SM21 - System Log
  
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to RFC connections.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to diagnose and resolve the ISLM_DI_GEN256 error in your SAP system.