How To Fix CNVMBT221 - Definition of destination &1 incorrect - connection not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: CNVMBT - Messages for MBT/API/PCL

• Message number: 221

• Message text: Definition of destination &1 incorrect - connection not possible

The definition of the mentioned RFC destination has been changed and
connection has been tested.
The connection to the corresponding system was NOT possible.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Check whether the corresponding target system is online.
Check / correct the settings of the mentioned destination .

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNVMBT221 - Definition of destination &1 incorrect - connection not possible ?

  The SAP error message CNVMBT221 indicates that there is an issue with the definition of a destination in the system, which is preventing a connection from being established. This error typically arises in the context of data migration or system conversion processes, particularly when using the SAP Landscape Transformation (SLT) or SAP Data Services.
  Cause:
  
  Incorrect Destination Configuration: The destination defined in the SAP system (e.g., RFC destination) may be incorrectly configured. This could include wrong connection parameters, such as the hostname, port, or user credentials.
  Network Issues: There may be network connectivity issues between the SAP system and the target system.
  Authorization Issues: The user credentials used for the connection may not have the necessary authorizations to access the target system.
  Service Not Running: The service on the target system that the SAP system is trying to connect to may not be running or may be misconfigured.
  Firewall Restrictions: Firewalls or security settings may be blocking the connection between the systems.
  
  Solution:
  
  
  Check Destination Configuration:
  
  Go to transaction SM59 in the SAP GUI.
  Locate the RFC destination that is causing the issue.
  Verify the connection parameters (hostname, port, user, password) and ensure they are correct.
  Test the connection using the "Test Connection" button to see if it succeeds.
  
  
  
  Network Connectivity:
  
  Ensure that the network connection between the SAP system and the target system is stable and operational.
  Use tools like ping or telnet to check connectivity to the target system.
  
  
  
  User Authorizations:
  
  Verify that the user credentials used in the RFC destination have the necessary authorizations to access the target system.
  Check the user roles and authorizations in both the source and target systems.
  
  
  
  Service Status:
  
  Ensure that the necessary services on the target system are running. This may include checking the SAP Gateway or other relevant services.
  
  
  
  Firewall and Security Settings:
  
  Check if there are any firewall rules or security settings that might be blocking the connection. Work with your network/security team to ensure that the required ports are open.
  
  
  
  Review Logs:
  
  Check the system logs (transaction SM21) and the developer traces (transaction ST22) for any additional error messages that might provide more context about the issue.
  
  
  
  Related Information:
  
  Documentation: Refer to SAP Notes and documentation related to the specific version of SAP you are using for any known issues or additional troubleshooting steps.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  SAP Support: If the issue persists after following the above steps, consider reaching out to SAP Support for further assistance.
  
  By following these steps, you should be able to identify and resolve the cause of the CNVMBT221 error message.