How To Fix LTR2_ES_CHECK_CNV021 - Copy flag set, but no transformation rule assigned to any key field

SAP Error Message - Details

• Message type: E = Error

• Message class: LTR2_ES_CHECK_CNV - Messages for OBC Checks

• Message number: 021

• Message text: Copy flag set, but no transformation rule assigned to any key field

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message LTR2_ES_CHECK_CNV021 - Copy flag set, but no transformation rule assigned to any key field ?

  The SAP error message LTR2_ES_CHECK_CNV021 indicates that there is a configuration issue related to the data transformation process in the SAP Landscape Transformation (SLT) or Data Migration process. Specifically, it means that the copy flag is set for a certain operation, but there are no transformation rules assigned to any key field, which is necessary for the data transfer or transformation to occur correctly.
  Cause:
  
  Missing Transformation Rules: The primary cause of this error is that the system expects transformation rules to be defined for the key fields of the data being processed, but none have been assigned.
  Incorrect Configuration: The configuration for the data transfer or transformation may not have been set up correctly, leading to the absence of necessary transformation rules.
  Data Model Changes: If there have been changes to the data model (e.g., changes in the source or target structure), the existing transformation rules may no longer be valid or applicable.
  
  Solution:
  
  
  Define Transformation Rules:
  
  Go to the relevant transaction (e.g., LTRC for SLT) and check the configuration for the data transfer.
  Ensure that transformation rules are defined for all key fields that require them. This may involve creating new transformation rules or modifying existing ones.
  
  
  
  Check Copy Flag Settings:
  
  Review the settings for the copy flag. If the copy flag is not needed, consider disabling it to avoid the error.
  If the copy flag is necessary, ensure that the corresponding transformation rules are correctly assigned.
  
  
  
  Validate Data Model:
  
  If there have been changes to the data model, validate that the transformation rules align with the current structure of the source and target tables.
  Update or create new transformation rules as necessary to reflect any changes in the data model.
  
  
  
  Testing:
  
  After making the necessary changes, perform a test run to ensure that the error is resolved and that data is being transformed and transferred correctly.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as LTRC (for SLT configuration), LTR2 (for transformation rules), and others that may be pertinent to your specific SAP environment.
  Documentation: Refer to SAP documentation or help resources for detailed guidance on setting up transformation rules and configuring data transfers.
  SAP Notes: Check for any SAP Notes related to this error message, as they may provide additional insights or patches that could resolve the issue.
  
  By following these steps, you should be able to address the error message LTR2_ES_CHECK_CNV021 and ensure that your data transformation process is functioning correctly.