How To Fix CNV20400202 - Optimization: Convert fields from split package also in merge package

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV20400 - Message class CNV20400

• Message number: 202

• Message text: Optimization: Convert fields from split package also in merge package

Optimization: Convert fields from split package also in merge package
This optimization step checks if all table fields which are converted
in the split are also existing in CNVFIELDS to be converted in the
merge.
If the field is not existing in CNVFIELDS for the merge then an error
message is printed because the field has to be entered with an
applicable conversion routine into CNVFIELDS. If the field is existing
in CNVFIELDS but with NOTUSE='X' then the flag is changed to NOTUSE='
'.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV20400202 - Optimization: Convert fields from split package also in merge package ?

  The SAP error message CNV20400202 is related to the data migration process, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error typically occurs during the optimization phase of the data conversion process, specifically when there are issues with the handling of fields that are split across different packages.
  Cause:
  The error message indicates that there are fields that are defined in a split package but are also required in a merge package. This situation can arise due to inconsistencies in the data model or configuration, where the same fields are being processed in different contexts, leading to conflicts or ambiguities in the data migration process.
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review the Data Model: Check the data model to ensure that the fields in question are correctly defined and that there are no conflicts between the split and merge packages.
  
  
  Adjust the Migration Package: If possible, adjust the migration package to ensure that the fields are consistently defined across both the split and merge packages. This may involve modifying the mapping or transformation rules.
  
  
  Check for Duplicates: Ensure that there are no duplicate definitions of the fields in different packages. If duplicates exist, consolidate them to avoid conflicts.
  
  
  Consult Documentation: Refer to the SAP documentation related to the specific migration tool you are using. There may be specific guidelines or best practices for handling split and merge packages.
  
  
  Use SAP Notes: Check for any relevant SAP Notes that may address this specific error. SAP frequently releases updates and fixes that can help resolve known issues.
  
  
  Testing: After making adjustments, perform thorough testing to ensure that the data migration process runs smoothly without further errors.
  
  
  Related Information:
  
  SAP S/4HANA Migration Cockpit: This tool is used for migrating data to SAP S/4HANA and may have specific guidelines for handling data packages.
  Data Migration Best Practices: Familiarize yourself with best practices for data migration in SAP environments, which can help prevent similar issues in the future.
  SAP Community and Forums: Engaging with the SAP community can provide insights and solutions from other users who may have encountered similar issues.
  
  If the problem persists after following these steps, consider reaching out to SAP support for further assistance.