How To Fix RSCNV812 - Undo for the conversion is not possible.

SAP Error Message - Details

• Message type: E = Error

• Message class: RSCNV - Messages class for Metadata Remodeling Toolbox

• Message number: 812

• Message text: Undo for the conversion is not possible.

What causes this issue?

Undo of the conversion step cannot be processed. The possible reasons
are:
1. The Shadow table doesn't exists to recover the data.
2. In case of DSO, the remodeling has failed in the Change Log step.
3. The remodeling has failed at the step where it can't be Undone.
4. The user doesn't have authorization for the object 'S_DEVELOP'.

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

System Response

How to fix this error?

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 RSCNV812 - Undo for the conversion is not possible. ?

  The SAP error message RSCNV812, which states "Undo for the conversion is not possible," typically occurs during data conversion processes, particularly when using the SAP Data Transfer Workbench or during data migration activities. This error indicates that the system is unable to reverse a conversion operation that has already been executed.
  Causes:
  
  Incomplete Data Conversion: The conversion process may not have been completed successfully, leading to inconsistencies in the data.
  Data Integrity Issues: There may be issues with the data being converted, such as invalid formats or missing required fields.
  System Configuration: Incorrect settings in the conversion program or data mapping can lead to this error.
  Locking Issues: If the data being converted is locked by another process, it may prevent the undo operation from being executed.
  Technical Limitations: Certain types of conversions may not support undo operations due to the nature of the data or the conversion logic.
  
  Solutions:
  
  Check Data Integrity: Review the data being converted for any inconsistencies or errors. Ensure that all required fields are populated and that the data formats are correct.
  Review Conversion Logs: Check the logs generated during the conversion process for any warnings or errors that may provide insight into what went wrong.
  Re-run the Conversion: If the initial conversion was incomplete, try re-running the conversion process. Ensure that all prerequisites are met before doing so.
  Adjust Configuration Settings: Verify the configuration settings for the conversion program. Make sure that the mapping and transformation rules are correctly defined.
  Release Locks: If the data is locked, identify the process that is holding the lock and release it if possible. You can use transaction codes like SM12 to check for locks.
  Consult SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error or provide additional troubleshooting steps.
  Contact SAP Support: If the issue persists, consider reaching out to SAP Support for assistance, especially if it involves complex data structures or custom developments.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes related to data conversion, such as LSMW (Legacy System Migration Workbench) or other data migration tools.
  Documentation: Review SAP documentation related to data migration and conversion processes for best practices and guidelines.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to diagnose and resolve the RSCNV812 error effectively.