How To Fix CNV_20900240 - Temporary duplicates and Scenario determination check:

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_20900 - Message class for package CNV_20900

• Message number: 240

• Message text: Temporary duplicates and Scenario determination check:

What causes this issue?

If one vendor number is changing to another one which is already
existing in the mapping as an old vendor number.
For example: If A >B and B >C maintained in mapping
If you want to convert vendor number A->B and B->C and A & B
vendor numbers are already existing in the table LFA1, then you can see
a message specifying the Temporary duplicates .

System Response

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

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_20900240 - Temporary duplicates and Scenario determination check: ?

  The SAP error message CNV_20900240, which refers to "Temporary duplicates and Scenario determination check," typically arises during data migration or conversion processes, particularly when using SAP's data migration tools like the SAP S/4HANA Migration Cockpit or other conversion tools.
  Cause:
  
  Temporary Duplicates: This error indicates that the system has detected temporary duplicate entries in the data being processed. This can happen if the same data is being loaded multiple times or if there are inconsistencies in the data source.
  Scenario Determination Check: The error may also relate to the system's inability to determine the correct scenario for processing the data due to these duplicates. This can occur if the data does not meet the expected criteria for a specific migration scenario.
  
  Solution:
  
  Identify Duplicates: Review the data being migrated to identify any duplicate entries. This can often be done by running queries or using data profiling tools to check for duplicates in the source data.
  Data Cleansing: Once duplicates are identified, cleanse the data by removing or consolidating duplicate entries. Ensure that the data adheres to the expected format and structure required by the migration tool.
  Check Migration Settings: Review the settings and configurations of the migration tool to ensure that the correct scenario is selected and that the data mapping is correctly defined.
  Re-run the Migration: After cleansing the data and ensuring that there are no duplicates, re-run the migration process to see if the error persists.
  Consult Documentation: Refer to the SAP documentation related to the specific migration tool you are using for any additional troubleshooting steps or guidelines.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context and solutions.
  SAP Community: Engage with the SAP Community forums where other users may have encountered similar issues and can provide insights or solutions.
  Data Migration Best Practices: Familiarize yourself with best practices for data migration, including data validation, cleansing, and testing to minimize the occurrence of such errors in the future.
  
  If the issue persists after following these steps, it may be beneficial to reach out to SAP support for further assistance.