How To Fix CNV_PE_PCL029 - Creation or modification of subactivity &1 (main session ID &2) failed

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_PE_PCL - Messages for PE<->PCL interaction

• Message number: 029

• Message text: Creation or modification of subactivity &1 (main session ID &2) failed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_PE_PCL029 - Creation or modification of subactivity &1 (main session ID &2) failed ?

  The SAP error message CNV_PE_PCL029 indicates that there was a failure in the creation or modification of a subactivity in a main session. This error typically occurs in the context of data migration or conversion processes, particularly when using SAP's tools for data migration, such as the SAP S/4HANA Migration Cockpit or other data conversion tools.
  Causes:
  
  Database Locking Issues: The main session might be locked by another process, preventing the creation or modification of the subactivity.
  Authorization Issues: The user executing the operation may not have the necessary authorizations to create or modify subactivities.
  Data Integrity Issues: There may be inconsistencies or issues with the data being processed, which could lead to failures in creating or modifying subactivities.
  Technical Errors: There could be underlying technical issues, such as problems with the database or the application server.
  
  Solutions:
  
  Check for Locks: Use transaction codes like SM12 to check for any locks on the main session. If you find locks, you may need to wait for the other process to complete or resolve the lock.
  Review Authorizations: Ensure that the user has the necessary authorizations to perform the operation. You can check the user's roles and authorizations in transaction SU53 or PFCG.
  Validate Data: Review the data being processed for any inconsistencies or errors. Ensure that all required fields are populated and that the data adheres to the expected formats.
  Check Logs: Look at the application logs (transaction SLG1) for more detailed error messages that could provide additional context on why the operation failed.
  Retry the Operation: After addressing any identified issues, try to create or modify the subactivity again.
  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 SM21 (System Log), ST22 (Dump Analysis), and SLG1 (Application Log) for troubleshooting.
  SAP Documentation: Review the official SAP documentation for the specific data migration tool you are using, as it may provide additional insights into common issues and their resolutions.
  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 problem persists after trying the above solutions, consider reaching out to SAP support for further assistance.