How To Fix CNV_MBT351 - Activity start at destination &1 was not possible - try again later

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_MBT - PCL message class

• Message number: 351

• Message text: Activity start at destination &1 was not possible - try again later

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 CNV_MBT351 - Activity start at destination &1 was not possible - try again later ?

  The SAP error message "CNV_MBT351 Activity start at destination &1 was not possible - try again later" typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that the system was unable to initiate a specific activity at the designated destination, which could be due to various reasons.
  Possible Causes:
  
  System Load: The destination system may be under heavy load or experiencing performance issues, preventing the activity from starting.
  Locking Issues: There may be locks on the database or specific objects that are preventing the activity from executing.
  Configuration Issues: Incorrect configuration settings in the migration cockpit or related tools may lead to this error.
  Network Issues: Connectivity problems between the source and destination systems can also cause this error.
  Authorization Issues: The user executing the migration may not have the necessary authorizations to perform the activity at the destination.
  Temporary System Issues: The destination system might be undergoing maintenance or experiencing temporary issues.
  
  Solutions:
  
  Retry the Activity: As the message suggests, simply waiting for a while and then trying again may resolve the issue if it was due to temporary load or locking.
  Check System Performance: Monitor the performance of the destination system to ensure it is not overloaded. You can use transaction codes like ST03N or SM66 to check system load.
  Review Locks: Use transaction code SM12 to check for any locks that might be preventing the activity from starting. If necessary, release the locks if they are no longer needed.
  Verify Configuration: Double-check the configuration settings in the migration cockpit to ensure everything is set up correctly.
  Check Network Connectivity: Ensure that there are no network issues between the source and destination systems. You can use tools like ping or traceroute to diagnose connectivity.
  User Authorizations: Verify that the user has the necessary authorizations to perform the migration activities. You can check this in transaction SU53 or by consulting with your security team.
  Consult Logs: Check the application logs (transaction SLG1) for any additional error messages or details that might provide more context about the failure.
  Contact SAP Support: If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM12 (to check locks), ST22 (for dumps), SLG1 (for application logs), and SM21 (for system logs).
  SAP Notes: Search for relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  Documentation: Review the official SAP documentation for the migration tool you are using, as it may contain specific guidelines or known issues related to this error.
  
  By following these steps, you should be able to diagnose and potentially resolve the error CNV_MBT351.