How To Fix CNV_MBT048 - Connection to one or more RFC destinations failed

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_MBT - PCL message class

• Message number: 048

• Message text: Connection to one or more RFC destinations failed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_MBT048 - Connection to one or more RFC destinations failed ?

  The SAP error message CNV_MBT048 indicates that there is a failure in establishing a connection to one or more RFC (Remote Function Call) destinations. This error typically arises during data migration or system conversion processes, particularly when using tools like SAP S/4HANA Migration Cockpit or other data transfer methods.
  Causes:
  
  
  Incorrect RFC Destination Configuration: The RFC destination may not be configured correctly in the SAP system. This includes incorrect connection parameters such as the target system's hostname, system number, client, user credentials, etc.
  
  
  Network Issues: There may be network connectivity issues between the source and target systems, such as firewalls blocking the connection or network outages.
  
  
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations to access the target system.
  
  
  Target System Unavailability: The target SAP system may be down or not reachable due to maintenance or other issues.
  
  
  SAP Gateway Issues: The SAP Gateway service may not be running on the target system, preventing the connection.
  
  
  Solutions:
  
  
  Check RFC Destination Configuration:
  
  Go to transaction SM59 in the SAP GUI.
  Verify the configuration of the RFC destination that is failing. Ensure that the connection parameters (like hostname, system number, client, user, and password) are correct.
  Test the connection using the "Test Connection" button in SM59.
  
  
  
  Network Connectivity:
  
  Ensure that there are no network issues preventing the connection. You can use tools like ping or telnet to check connectivity to the target system.
  Check firewall settings to ensure that the required ports for RFC communication are open.
  
  
  
  User Authorizations:
  
  Verify that the user credentials used for the RFC connection have the necessary authorizations in the target system. You may need to check roles and profiles assigned to the user.
  
  
  
  Check Target System Status:
  
  Ensure that the target SAP system is up and running. You can check the system status in the SAP GUI or through system monitoring tools.
  
  
  
  SAP Gateway Service:
  
  Ensure that the SAP Gateway service is running on the target system. You can check this in transaction SMGW.
  
  
  
  Review Logs:
  
  Check the system logs (transaction SM21) and the developer trace files (transaction ST11) for any additional error messages that might provide more context about the failure.
  
  
  
  Related Information:
  
  RFC Destinations: RFC destinations are used in SAP to define how to connect to other SAP systems or external systems. They can be configured as TCP/IP connections, HTTP connections, etc.
  SAP Notes: Check for any relevant SAP Notes that might address known issues related to RFC connections or the specific error message.
  Documentation: Refer to the official SAP documentation for detailed guidance on configuring RFC destinations and troubleshooting connectivity issues.
  
  By following these steps, you should be able to identify and resolve the cause of the CNV_MBT048 error message.