How To Fix CNV_OM_PRESEL304 - Unexpected error when scheduling preselection tasks.

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_OM_PRESEL - Messages for LT Object Based Preselection

• Message number: 304

• Message text: Unexpected error when scheduling preselection tasks.

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_OM_PRESEL304 - Unexpected error when scheduling preselection tasks. ?

  The SAP error message CNV_OM_PRESEL304 indicates that there was an unexpected error when trying to schedule preselection tasks in the context of a data migration or conversion process, typically associated with the SAP S/4HANA Migration Cockpit or other data migration tools.
  Possible Causes:
  
  Configuration Issues: Incorrect or incomplete configuration settings in the migration cockpit or related tools.
  Authorization Problems: The user executing the task may not have the necessary authorizations to schedule preselection tasks.
  System Performance: Insufficient system resources (CPU, memory, etc.) may lead to unexpected errors during task scheduling.
  Data Issues: Problems with the data being processed, such as inconsistencies or invalid entries, can cause errors.
  Software Bugs: There may be bugs in the version of the software being used, which could lead to unexpected behavior.
  
  Solutions:
  
  Check Configuration: Review the configuration settings for the migration cockpit or the specific data migration tool you are using. Ensure that all necessary parameters are correctly set.
  User Authorizations: Verify that the user has the appropriate authorizations to perform the task. You may need to consult with your SAP security team to ensure the user has the required roles and permissions.
  Monitor System Resources: Check the system performance metrics to ensure that there are enough resources available. If necessary, consider optimizing the system or scheduling tasks during off-peak hours.
  Data Validation: Validate the data being processed to ensure there are no inconsistencies or invalid entries. Use data cleansing techniques if necessary.
  Check for Updates: Ensure that you are using the latest version of the software and that all relevant patches have been applied. Check SAP Notes for any known issues related to this error message.
  Review Logs: Look at the application logs and system logs for more detailed error messages that can provide additional 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. Provide them with detailed information about the error, including any logs or screenshots.
  
  Related Information:
  
  SAP Notes: Search for relevant SAP Notes that may address this specific error or provide guidance on similar issues.
  Documentation: Review the official SAP documentation for the migration tool you are using to ensure that you are following the recommended procedures.
  Community Forums: Check SAP Community forums or other user groups for discussions related to this error, as other users may have encountered and resolved similar issues.
  
  By following these steps, you should be able to diagnose and resolve the CNV_OM_PRESEL304 error effectively.