How To Fix CNV_PE185 - Transformation rule &1 already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_PE - General messages for posting engine

• Message number: 185

• Message text: Transformation rule &1 already exists

What causes this issue?

Transformation rule name &V1&
Transformation rule repository &V2&

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?

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_PE185 - Transformation rule &1 already exists ?

  The SAP error message "CNV_PE185 Transformation rule &1 already exists" typically occurs during data migration or transformation processes, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error indicates that a transformation rule with the specified identifier (represented by &1) already exists in the system.
  Cause:
  
  
  Duplicate Transformation Rule: The most common cause of this error is that a transformation rule with the same name or identifier has already been created in the system. This can happen if:
  
  The same migration project is being executed multiple times without proper cleanup.
  There was an attempt to create a new transformation rule with an identifier that is already in use.
  
  
  
  Incorrect Configuration: Sometimes, the configuration settings or the mapping of the transformation rules may lead to conflicts, resulting in the creation of duplicate entries.
  
  
  Solution:
  
  
  Check Existing Transformation Rules:
  
  Navigate to the relevant transaction or application where transformation rules are managed (e.g., the Migration Cockpit).
  Search for the transformation rule using the identifier provided in the error message.
  If the rule exists and is not needed, consider deleting or modifying it.
  
  
  
  Modify the Identifier:
  
  If you need to create a new transformation rule, ensure that you use a unique identifier that does not conflict with existing rules.
  
  
  
  Cleanup Previous Migration Attempts:
  
  If you are running a migration process multiple times, ensure that you clean up any previous transformation rules that are no longer needed. This can help prevent conflicts.
  
  
  
  Consult Documentation:
  
  Review the SAP documentation related to the specific migration tool you are using. There may be guidelines on how to handle transformation rules and avoid conflicts.
  
  
  
  Contact SAP Support:
  
  If the issue persists and you cannot identify the cause, consider reaching out to SAP Support for assistance. They may provide insights specific to your system configuration or version.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as LTMC (for Migration Cockpit) or other related tools that manage transformation rules.
  SAP Notes: Check for any SAP Notes related to the error message or the migration tool you are using. SAP Notes often contain fixes or workarounds for known issues.
  Best Practices: Follow best practices for data migration, including proper documentation of transformation rules and maintaining a clean environment to avoid duplication.
  
  By following these steps, you should be able to resolve the error and continue with your data migration or transformation process.