How To Fix CNV_10020770 - &1 &2: &3 does not allow initial target determination values

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_10020 - Message class for package 10020

• Message number: 770

• Message text: &1 &2: &3 does not allow initial target determination values

What causes this issue?

The determination result of &V3& is compared with a value list &V4& that
contains the value space. By default, determination paths treat an
initial target determination value as a missing information. The result
is a determination failure.

System Response

A comparison with space won't be performed.

How to fix this error?

If you want to treat the initial value as a value, go to the path
definition of &V3& using transaction CNV_10020_OBJECTS. On the tab strip
"Determination" set the indicator "Allow initial TDetValues"
accordingly. You can do this only for elementary relationships and
converter paths. For single and multiple paths it has to be done for all
of their sub paths.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_10020770 - &1 &2: &3 does not allow initial target determination values ?

  The SAP error message CNV_10020770 typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that the system is unable to determine initial target values for a specific field or entity, which is often due to configuration or data issues.
  Cause:
  
  Missing Configuration: The target system may not have the necessary configuration set up for the specific entity or field that is being processed.
  Data Inconsistencies: The source data may contain inconsistencies or invalid values that do not match the expected format or constraints in the target system.
  Mapping Issues: There may be issues with the mapping of fields between the source and target systems, leading to the inability to determine initial values.
  Authorization Issues: The user executing the migration may not have the necessary authorizations to access or modify the target values.
  
  Solution:
  
  Check Configuration: Ensure that the target system is properly configured for the entities being migrated. This includes checking for necessary settings in customizing (SPRO) related to the specific module or area.
  Validate Source Data: Review the source data for any inconsistencies or invalid entries. Cleanse the data as necessary to ensure it meets the requirements of the target system.
  Review Mapping: Verify the mapping of fields between the source and target systems. Ensure that all required fields are correctly mapped and that there are no missing mappings.
  Authorization Check: Ensure that the user executing the migration has the necessary authorizations to perform the operation. This may involve checking roles and permissions in the target system.
  Consult Documentation: Refer to SAP documentation or notes related to the specific migration scenario you are working on. There may be specific guidelines or prerequisites that need to be followed.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on data migration issues.
  Migration Cockpit Documentation: Review the official SAP documentation for the Migration Cockpit, which may provide insights into common issues and their resolutions.
  Community Forums: Engage with the SAP Community or forums where other users may have encountered similar issues and can share their solutions.
  
  If the issue persists after following these steps, it may be beneficial to engage with SAP support for further assistance.