How To Fix CNV_PE_GEN035 - Extension TRule generation not possible; TRule &1 already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_PE_GEN - Messages for object generation

• Message number: 035

• Message text: Extension TRule generation not possible; TRule &1 already exists

What causes this issue?

The transformation rule does already exist in repository &V3&, but is
<ZH>not </>registered as a generated object in the corresponding posting
engine object

System Response

Error

How to fix this error?

Regenerate the transformation rule using the expert function.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_PE_GEN035 - Extension TRule generation not possible; TRule &1 already exists ?

  The SAP error message CNV_PE_GEN035 indicates that there is an issue with the generation of a Transformation Rule (TRule) because a TRule with the same name already exists in the system. This error typically occurs during data migration or conversion processes, particularly when using SAP's Data Migration tools or Conversion tools.
  Cause:
  The primary cause of this error is that the system is attempting to create a new Transformation Rule (TRule) with a name that already exists in the database. This can happen due to:
  
  Duplicate entries in the migration or conversion configuration.
  An attempt to regenerate a TRule that has already been created.
  A previous migration attempt that did not complete successfully, leaving behind existing TRules.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Existing TRules:
  
  Use transaction codes like SE11 (Data Dictionary) or SE80 (Object Navigator) to check if the TRule with the specified name already exists.
  You can also use the relevant migration tool or transaction to list existing TRules.
  
  
  
  Rename or Delete Existing TRule:
  
  If the existing TRule is no longer needed, you can delete it. Be cautious and ensure that it is safe to delete.
  If you need to keep the existing TRule, consider renaming the new TRule you are trying to create to avoid the conflict.
  
  
  
  Review Migration Configuration:
  
  Check the configuration settings for the migration or conversion process to ensure that there are no duplicate entries or misconfigurations that could lead to the creation of duplicate TRules.
  
  
  
  Log Analysis:
  
  Review the logs for any additional error messages or warnings that might provide more context about why the TRule generation is failing.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to the specific migration tool you are using for any additional troubleshooting steps or known issues.
  
  
  
  Contact SAP Support:
  
  If the issue persists and you cannot identify the cause, consider reaching out to SAP Support for assistance. They may have additional insights or patches available for your specific situation.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes for data migration, such as LTMC (Legacy Transfer Migration Cockpit) or LTMOM (Migration Object Modeler).
  SAP Notes: Search for SAP Notes related to the specific migration tool you are using, as they may contain fixes or workarounds for known issues.
  Documentation: Review the official SAP Help Portal for detailed guides on using the migration tools and handling errors.
  
  By following these steps, you should be able to resolve the CNV_PE_GEN035 error and successfully generate the required Transformation Rule.