How To Fix CNV_10020100 - Elementary relationship &1: Spec. form &2 has wrong interface

CNV_10020100 - Overview

• Message type: E = Error

• Message class: CNV_10020 - Message class for package 10020

• Message number: 100

• Message text: Elementary relationship &1: Spec. form &2 has wrong interface

What causes this issue?

Specific routine &V2& has been assigned for mass determination to
elementary relationship &V1&. However the interface is not defined
correctly.

How to fix this error?

Correct the interface definition of routine &V2&. <ZH>Note that the
definition must correspond EXACTLY to the definition of the sample
routine &V3& </>, because the call is explicitly included in the
programming.
<ZH>Note:</> The system checks the interface definition by comparing
the interface definition for routine &V2& with the corresponding
definition for sample routine &V3&. This is also why the interface
parameters have to have exactly the same names. Even the formatting
must be identical.
The best solution is to copy routine &V3& the routine you want to use.
<ZH>Note:</> The only setting you can change is the structure
definition of table parameter PT_LOR. This definition must comply with
the lengths of the determination objects.
For paths with interval definitions, the corresponding change to ROR
definition is required.

Error message extract from SAP system. Copyright SAP SE.

CNV_10020100 - Details

• The SAP error message CNV_10020100 typically relates to issues encountered during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This specific error indicates that there is a problem with the interface of a specified form in the context of an elementary relationship.
  
  Cause:
  The error message can arise due to several reasons, including:
  
  Incorrect Configuration: The specified form (e.g., a data structure or mapping) may not be correctly configured or may not match the expected interface for the elementary relationship.
  Data Model Changes: If there have been changes in the data model or the underlying structures in the source or target systems, this can lead to mismatches.
  Version Mismatch: The version of the migration tool or the data model being used may not be compatible with the version of the SAP system.
  Missing or Incorrect Mapping: The mapping between source and target fields may be incomplete or incorrect,