How To Fix CNV_MBT231 - Scheduling of subactivity &1 task &2 failed

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_MBT - PCL message class

• Message number: 231

• Message text: Scheduling of subactivity &1 task &2 failed

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 CNV_MBT231 - Scheduling of subactivity &1 task &2 failed ?

  The SAP error message CNV_MBT231 indicates that there was a failure in scheduling a subactivity for a task during a data migration or conversion process. This error is typically associated with the SAP S/4HANA Migration Cockpit or other data migration tools within SAP.
  Cause:
  The error can be caused by several factors, including:
  
  Resource Availability: The system may not have enough resources (e.g., memory, CPU) to schedule the task.
  Configuration Issues: There may be misconfigurations in the migration settings or parameters.
  Locking Issues: The task may be trying to access a resource that is currently locked by another process.
  Data Issues: There may be issues with the data being processed, such as inconsistencies or invalid entries.
  System Performance: High system load or performance issues can lead to scheduling failures.
  
  Solution:
  To resolve the error, you can take the following steps:
  
  Check System Resources: Ensure that the system has adequate resources available. Monitor CPU and memory usage during the migration process.
  Review Configuration: Verify the configuration settings for the migration process. Ensure that all parameters are set correctly.
  Check for Locks: Use transaction codes like SM12 to check for any locks on the resources that the task is trying to access. If locks are found, you may need to release them.
  Examine Logs: Look at the logs for more detailed error messages. You can check the application logs (transaction SLG1) for any related entries that might provide more context.
  Data Validation: Validate the data being migrated to ensure there are no inconsistencies or invalid entries that could cause the task to fail.
  Retry the Task: After addressing any identified issues, try to rerun the migration task to see if the problem persists.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SLG1 (Application Log), SM12 (Lock Entries), and ST22 (Dump Analysis) for troubleshooting.
  SAP Documentation: Refer to the official SAP documentation for the Migration Cockpit or the specific data migration tool you are using for best practices and troubleshooting tips.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  
  If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance.