How To Fix CNV_PE_POST406 - Undo failed; see long text

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_PE_POST -

• Message number: 406

• Message text: Undo failed; see long text

What causes this issue?

An error occurred during the undo of the worklist item. Therefore
calling the transfer function module ended with sy-subrc &V3&.

System Response

Error message: &V1&&V2&
Worklist item: &V4&

How to fix this error?

Correct the error. Note that you may have to re-build the undo transfer
list prior to undoing the worklist item.
In case of a runtime error you may also check transaction
<DS:TRAN.ST22>ST22</> in the corresponding remote system.

Procedure for System Administrators

Sy-subrc,,Meaning
91,,Error message
92,,Communication failure
99,,System failure

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_PE_POST406 - Undo failed; see long text ?

  The SAP error message CNV_PE_POST406: Undo failed; see long text typically occurs during data migration or conversion processes, particularly when using the SAP Landscape Transformation (SLT) or other data migration tools. This error indicates that an attempt to undo a previous operation has failed, which can be due to various reasons.
  Causes:
  
  Data Integrity Issues: There may be inconsistencies or integrity violations in the data that prevent the undo operation from completing successfully.
  Locking Issues: The data being modified might be locked by another process or user, preventing the undo operation from executing.
  Configuration Errors: Incorrect configuration settings in the migration tool or the source/target systems can lead to this error.
  Transaction Failures: If a previous transaction failed and the system is trying to roll back changes, it may encounter issues if the state of the data has changed since the transaction was initiated.
  System Resource Limitations: Insufficient system resources (like memory or disk space) can also lead to failures in executing undo operations.
  
  Solutions:
  
  Check Long Text: The first step is to check the long text associated with the error message for more specific details about the failure. This can provide insights into what went wrong.
  Review Logs: Look at the application logs and system logs to identify any underlying issues that may have caused the undo operation to fail.
  Data Consistency Check: Ensure that the data being processed is consistent and adheres to the required integrity constraints.
  Release Locks: If the issue is related to locking, check for any active locks on the data and release them if necessary.
  Configuration Review: Verify the configuration settings of the migration tool and ensure they are correctly set up for the data being processed.
  Retry the Operation: After addressing any identified issues, try to rerun the operation that caused the error.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide patches or updates.
  Contact SAP Support: If the issue persists, consider reaching out to SAP Support for further assistance, providing them with detailed logs and error messages.
  
  Related Information:
  
  SAP Notes: Search for specific SAP Notes related to the CNV_PE_POST406 error for any known issues or fixes.
  Documentation: Review the documentation for the data migration tool you are using (e.g., SAP Data Services, SLT) for best practices and troubleshooting steps.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed.
  
  By following these steps, you should be able to diagnose and resolve the CNV_PE_POST406 error effectively.