How To Fix CNV21500029 - Type of data unknown for &1 (structure &2).

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV21500 - Messages for HR conversions basis

• Message number: 029

• Message text: Type of data unknown for &1 (structure &2).

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV21500029 - Type of data unknown for &1 (structure &2). ?

  The SAP error message CNV21500029 indicates that there is an issue with the data type being processed in a conversion or migration scenario. Specifically, it states that the type of data is unknown for a particular field (represented by &1) in a specified structure (represented by &2). This error typically arises during data migration processes, such as when using the SAP S/4HANA Migration Cockpit or other data conversion tools.
  Cause:
  
  Unknown Data Type: The system encountered a field in the data structure that it does not recognize or cannot map to a known data type. This can happen if the field is not defined correctly in the source system or if there are discrepancies in the data model.
  Inconsistent Data Model: The source and target systems may have different data models, leading to fields that exist in one system but not in the other.
  Custom Fields: If there are custom fields in the source system that are not defined in the target system, the migration tool may not know how to handle them.
  Configuration Issues: There may be configuration issues in the migration settings that prevent the system from correctly interpreting the data types.
  
  Solution:
  
  Check Data Structure: Review the data structure in both the source and target systems to ensure that all fields are correctly defined and that their data types are compatible.
  Mapping Configuration: If you are using a migration tool, check the mapping configuration to ensure that all fields are correctly mapped from the source to the target. You may need to manually define mappings for custom fields.
  Data Type Definitions: Ensure that all data types used in the source system are defined in the target system. If there are custom data types, you may need to create them in the target system.
  Update Migration Settings: If applicable, update the migration settings to handle unknown data types or to skip certain fields that are not necessary for the migration.
  Consult Documentation: Refer to SAP documentation or notes related to the specific migration tool you are using for any known issues or additional configuration steps.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide guidance on data migration issues.
  Migration Cockpit: If you are using the SAP S/4HANA Migration Cockpit, review the documentation for best practices and troubleshooting tips.
  Data Dictionary: Use transaction codes like SE11 (Data Dictionary) to inspect the definitions of the structures and fields involved in the error.
  Community Forums: Consider searching or posting in SAP Community forums for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.