How To Fix CNV_10020644 - &1 &2: Proxy &3 in field to be converted is undefined

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_10020 - Message class for package 10020

• Message number: 644

• Message text: &1 &2: Proxy &3 in field to be converted is undefined

What causes this issue?

The field to be converted contains a proxy &V3& that is undefined.

How to fix this error?

Define the proxy &V3& and its value using transaction CNV_10020_PROXYF.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_10020644 - &1 &2: Proxy &3 in field to be converted is undefined ?

  The SAP error message CNV_10020644 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 a proxy field in the data being processed is undefined, which means that the system is unable to find a corresponding value for the specified field in the source data.
  Cause:
  
  Missing Data: The most common cause is that the source data does not contain a value for the specified proxy field. This could be due to incomplete data extraction or transformation processes.
  Mapping Issues: There may be a mapping issue where the source field is not correctly mapped to the target field in the migration configuration.
  Configuration Errors: Incorrect configuration settings in the migration cockpit or data migration tool can lead to this error.
  Data Type Mismatch: The data type of the source field may not match the expected data type in the target system, leading to undefined values.
  
  Solution:
  
  Check Source Data: Review the source data to ensure that all required fields, including the proxy field, are populated. If any fields are missing, you may need to correct the source data before re-running the migration.
  Review Mapping Configuration: Verify the mapping configuration in the migration tool to ensure that all fields are correctly mapped from the source to the target. Make adjustments as necessary.
  Data Validation: Implement data validation checks to ensure that the data being migrated meets the requirements of the target system. This can help identify any issues before the migration process.
  Consult Documentation: Refer to the SAP documentation for the specific migration tool you are using to understand the expected data formats and requirements.
  Error Logs: Check the error logs for more detailed information about the error. This can provide insights into which specific field is causing the issue and why it is undefined.
  Testing: Conduct a test migration with a smaller dataset to identify and resolve issues before performing a full migration.
  
  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 detailed instructions and best practices.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.