How To Fix CNV_MBT487 - Error when reading the previous message

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_MBT - PCL message class

• Message number: 487

• Message text: Error when reading the previous message

What causes this issue?

Error in function module 'CNV_MBT_MSG_READ_MESSAGE'.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Contact SAP.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_MBT487 - Error when reading the previous message ?

  The SAP error message CNV_MBT487 typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error indicates that there is an issue with reading or processing a previous message in the migration log.
  Cause:
  
  Data Inconsistency: The error may arise due to inconsistencies in the data being migrated, such as missing or incorrect entries.
  Configuration Issues: There may be configuration problems in the migration settings or parameters that are not set correctly.
  Previous Errors: If there were errors in previous steps of the migration process, they could lead to this error when trying to read the log.
  Authorization Issues: Lack of proper authorizations to access certain data or logs can also trigger this error.
  
  Solution:
  
  Check Migration Logs: Review the migration logs for any previous error messages that could provide more context. Look for any specific entries that indicate what went wrong.
  Data Validation: Ensure that the data being migrated is complete and consistent. Validate the data against the source system to identify any discrepancies.
  Reconfigure Migration Settings: If there are configuration issues, revisit the migration settings and ensure they are correctly set up according to the requirements of the migration process.
  Retry the Migration: If the previous errors have been resolved, try rerunning the migration process from the last successful step.
  Authorization Check: Ensure that the user executing the migration has the necessary authorizations to access all required data and logs.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes or updates related to this error message. There may be patches or updates that address known issues.
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for the Migration Cockpit or the specific migration tool you are using for detailed guidance on troubleshooting.
  SAP Community: Engage with the SAP Community forums where other users may have encountered similar issues and can provide insights or solutions.
  SAP Support: If the issue persists, consider reaching out to SAP Support for assistance, providing them with detailed logs and error messages for better diagnosis.
  
  By following these steps, you should be able to identify the root cause of the CNV_MBT487 error and implement a suitable solution.