How To Fix CNV_PE_POST406 - Undo failed; see long text

CNV_PE_POST406 - Overview

• 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.

CNV_PE_POST406 - Details

• 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