How To Fix CNV_PE_IF020 - Parameter &1 exists more than once

CNV_PE_IF020 - Overview

• Message type: E = Error

• Message class: CNV_PE_IF - Messages for interface and interface mapping handling

• Message number: 020

• Message text: Parameter &1 exists more than once

What causes this issue?

The system is trying to find the corresponding transfer method parameter
<ZH>&V1&</> in the transfer list interface. More than one parameter with
the same name was found.
<ZU>Parameter 1</>
<ZH>&V2&-&V1&</>
<ZU>Parameter 2</>
<ZH>&V3&-&V1&</>

System Response

To be able to uniquely identify a transfer method parameter in the
transfer list interface, fields and structures must <ZH>not </>exist
more than once since the identification is made based on name equality.

How to fix this error?

With the current information, it is <ZH>not </>possible to use the
transfer method.
Contact SAP for support.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

CNV_PE_IF020 - Details

• The SAP error message CNV_PE_IF020 indicates that a parameter (denoted as &1) exists more than once in a specific context, which typically occurs during data migration or conversion processes. This error is part of the SAP Conversion Tools and is often encountered when using the SAP S/4HANA Migration Cockpit or other data migration tools.
  
  Cause:
  The error is usually caused by:
  
  Duplicate Entries: The parameter in question has been defined multiple times in the configuration or data mapping settings.
  Incorrect Data Mapping: During the data migration process, the mapping of fields may have been set up incorrectly, leading to the same parameter being referenced multiple times.
  
  Configuration Issues: There may be issues in the configuration of the migration project, such as incorrect settings or parameters being defined in multiple places.
  
  
  Solution:
  To resolve the CNV_PE_IF020 error, you can take the following steps:
  
  
  Identify the Parameter: Check the error message for the specific parameter name that is causing the