How To Fix CNV_10020771 - &1 &2: &3 does not allow initial target determination values

CNV_10020771 - Overview

• Message type: E = Error

• Message class: CNV_10020 - Message class for package 10020

• Message number: 771

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

What causes this issue?

The determination result of &V3& is compared with 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
allof their sub paths.

Error message extract from SAP system. Copyright SAP SE.

CNV_10020771 - Details

• The SAP error message CNV_10020771 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 object due to certain constraints or settings.
  
  Cause:
  The error message can arise from several potential causes:
  
  Field Configuration: The target field may not be configured to accept initial values. This could be due to settings in the target system that restrict the input of certain values.
  Data Mapping Issues: There may be a mismatch in the data mapping between the source and target systems, leading to the inability to determine valid initial values.
  Missing Master Data: The required master data for the target field may not exist in the target system, preventing the system from determining valid initial values.
  Custom Logic: If there are custom enhancements or logic implemented in the target system,