How To Fix LTR2_T1_CT004 - RFC destination to sender system not defined in ES &1

SAP Error Message - Details

• Message type: E = Error

• Message class: LTR2_T1_CT -

• Message number: 004

• Message text: RFC destination to sender system not defined in ES &1

Self-Explanatory Message

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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 LTR2_T1_CT004 - RFC destination to sender system not defined in ES &1 ?

  The SAP error message LTR2_T1_CT004 indicates that there is an issue with the RFC (Remote Function Call) destination configuration in the SAP system. Specifically, it means that the RFC destination to the sender system is not defined in the Enterprise Services (ES) configuration.
  Cause:
  
  Missing RFC Destination: The RFC destination that the system is trying to use to communicate with the sender system is not defined in the SAP system.
  Incorrect Configuration: The RFC destination may be incorrectly configured or pointing to the wrong system.
  Authorization Issues: The user or service account may not have the necessary authorizations to access the RFC destination.
  Network Issues: There may be network connectivity issues preventing the SAP system from reaching the sender system.
  
  Solution:
  
  
  Define the RFC Destination:
  
  Go to transaction SM59 in the SAP GUI.
  Check if the required RFC destination is listed. If not, create a new RFC destination.
  Ensure that the destination is configured correctly with the appropriate connection type (e.g., TCP/IP).
  Test the connection to ensure it is working properly.
  
  
  
  Check Configuration:
  
  Verify that the RFC destination is correctly configured with the right parameters (e.g., target host, system number, client, user credentials).
  Ensure that the logical system name used in the configuration matches the one defined in the sender system.
  
  
  
  Authorization Check:
  
  Ensure that the user or service account used for the RFC connection has the necessary authorizations to access the destination.
  Check the roles and profiles assigned to the user.
  
  
  
  Network Connectivity:
  
  Check for any network issues that may be preventing communication between the systems.
  Ensure that firewalls or network security settings are not blocking the connection.
  
  
  
  Review Logs:
  
  Check the system logs (transaction SM21) and the application logs (transaction SLG1) for any additional error messages that may provide more context about the issue.
  
  
  
  Related Information:
  
  RFC Destinations: RFC destinations are used in SAP to define how systems communicate with each other. They can be configured for various types of connections, including local and remote systems.
  Enterprise Services: In the context of SAP, Enterprise Services are part of the SOA (Service-Oriented Architecture) that allows different systems to communicate and share data.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error message or provide additional troubleshooting steps.
  
  By following these steps, you should be able to resolve the error message LTR2_T1_CT004 and ensure that the RFC destination is properly configured for communication with the sender system.