How To Fix CNV_10020595 - Extended field name &1 defined incorrectly

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_10020 - Message class for package 10020

• Message number: 595

• Message text: Extended field name &1 defined incorrectly

What causes this issue?

In order to allow nested proxy, the extended field name can contain the
proxy symbol &V2& even multiple times. In such a case, the multiple
proxy have to be separated by a dash. &V1& contains several proxy that
are not separated by a dash.

How to fix this error?

Specify an extended field name that contains proxy separated by dashes.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_10020595 - Extended field name &1 defined incorrectly ?

  The SAP error message CNV_10020595, which states "Extended field name &1 defined incorrectly," typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error indicates that there is an issue with the definition of an extended field name in the context of the data being processed.
  Cause:
  
  Incorrect Field Definition: The extended field name specified in the migration or conversion process does not match the expected format or is not defined correctly in the system.
  Data Mapping Issues: There may be discrepancies in the mapping of fields between the source and target systems, leading to the use of an invalid or non-existent field name.
  Configuration Errors: The configuration settings for the migration or conversion process may not be set up correctly, leading to the use of incorrect field names.
  Version Compatibility: The error may arise if there are compatibility issues between the source data structure and the target system's data structure.
  
  Solution:
  
  Check Field Definitions: Verify that the extended field name specified in the error message is correctly defined in the target system. Ensure that it exists and is properly configured.
  Review Data Mapping: Go through the data mapping configuration to ensure that all fields are correctly mapped from the source to the target system. Make sure that the field names match the expected definitions.
  Adjust Configuration Settings: If there are any configuration settings related to the migration or conversion process, review and adjust them as necessary to ensure they align with the expected field definitions.
  Consult Documentation: Refer to SAP documentation or migration guides for the specific version of SAP you are using to ensure that you are following the correct procedures and definitions.
  Test with Sample Data: If possible, test the migration or conversion process with a smaller set of sample data to isolate the issue and confirm that the field definitions are correct.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on data migration issues.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Migration Cockpit Documentation: Review the official SAP documentation for the Migration Cockpit or the specific tool you are using for data migration to ensure compliance with the required field definitions and configurations.
  
  If the issue persists after following these steps, it may be beneficial to reach out to SAP support for further assistance.