How To Fix CNV20201064 - Target value &1 of individual rule is used more than once

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV20201 -

• Message number: 064

• Message text: Target value &1 of individual rule is used more than once

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV20201064 - Target value &1 of individual rule is used more than once ?

  The SAP error message CNV20201064 indicates that there is a problem with the configuration of individual rules in a data migration or conversion process, specifically that a target value is being used more than once in the mapping of source to target fields. This typically occurs in the context of data migration projects, such as those involving the SAP S/4HANA conversion or other data transformation tasks.
  Cause:
  The error arises when:
  
  The same target value is assigned to multiple source values in the mapping rules.
  There is a duplication in the configuration of the individual rules, leading to ambiguity in how the data should be transformed or migrated.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Review Individual Rules: Go through the individual rules defined in your mapping configuration. Look for any target values that are assigned to more than one source value.
  
  
  Identify Duplicates: Identify the specific target value that is causing the conflict. The error message will typically indicate which target value is duplicated.
  
  
  Modify Rules: Adjust the mapping rules to ensure that each target value is unique to a specific source value. You may need to:
  
  Change the target value for one of the conflicting source values.
  Combine source values if they can logically map to the same target value without causing data integrity issues.
  
  
  
  Test Changes: After making the necessary adjustments, re-run the migration or conversion process to ensure that the error is resolved.
  
  
  Documentation: Document the changes made to the mapping rules for future reference and to maintain clarity in the data migration process.
  
  
  Related Information:
  
  Data Migration Projects: This error is commonly encountered in data migration projects, especially when using tools like SAP S/4HANA Migration Cockpit or other data transformation tools.
  Mapping Configuration: Understanding how to configure mapping rules correctly is crucial. Familiarize yourself with the specific requirements and guidelines provided by SAP for the data migration process.
  SAP Notes and Documentation: Check SAP Notes and the official SAP Help Portal for any additional guidance or updates related to this error message. There may be specific recommendations or patches available.
  
  By following these steps, you should be able to resolve the CNV20201064 error and proceed with your data migration or conversion tasks successfully.