How To Fix CNV_MBT238 - Subactivity &1 is not to be restarted / repeated for session_id &2

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_MBT - PCL message class

• Message number: 238

• Message text: Subactivity &1 is not to be restarted / repeated for session_id &2

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_MBT238 - Subactivity &1 is not to be restarted / repeated for session_id &2 ?

  The SAP error message CNV_MBT238 indicates that a specific subactivity within a data migration session cannot be restarted or repeated. This error typically arises in the context of SAP's Migration Cockpit or during data migration processes, particularly when using the SAP S/4HANA Migration Cockpit or other data transfer tools.
  Cause:
  The error message CNV_MBT238 can occur due to several reasons:
  
  
  Subactivity Status: The subactivity you are trying to restart has already been completed or is in a state that does not allow it to be repeated. This could be due to the subactivity being designed to run only once or having dependencies that prevent it from being rerun.
  
  
  Session Lock: The session ID you are working with may be locked or in a state that does not permit further processing. This can happen if there are ongoing processes or if the session was not properly closed.
  
  
  Configuration Issues: There may be configuration settings in the migration cockpit that restrict the ability to repeat certain activities.
  
  
  Data Integrity: If the data has already been migrated or if there are integrity checks that have been violated, the system may prevent the subactivity from being repeated.
  
  
  Solution:
  To resolve the error CNV_MBT238, you can take the following steps:
  
  
  Check Subactivity Status: Review the status of the subactivity in the migration cockpit. If it has already been completed, you may need to proceed to the next step or activity.
  
  
  Session Management: Ensure that the session ID is not locked. You can check the session status in the migration cockpit and see if there are any ongoing processes. If necessary, you may need to terminate or reset the session.
  
  
  Review Configuration: Check the configuration settings for the migration cockpit to ensure that the subactivity is allowed to be repeated. You may need to consult with your SAP Basis or technical team for assistance.
  
  
  Data Validation: Ensure that the data you are trying to migrate does not violate any integrity constraints. If there are issues with the data, you may need to correct them before attempting to repeat the subactivity.
  
  
  Consult Documentation: Refer to the SAP documentation or notes related to the specific migration scenario you are working on. There may be specific guidelines or troubleshooting steps provided by SAP.
  
  
  Contact SAP Support: If the issue persists and you cannot determine the cause, consider reaching out to SAP Support for further assistance. They can provide insights based on the specific context of your migration scenario.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Migration Cockpit Documentation: Review the official SAP documentation for the Migration Cockpit, which may provide insights into the expected behavior of subactivities and how to manage them.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to diagnose and resolve the CNV_MBT238 error effectively.