How To Fix CNV20400015 - For table &1, there is more than one key field for convers; no simulation

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV20400 - Message class CNV20400

• Message number: 015

• Message text: For table &1, there is more than one key field for convers; no simulation

What causes this issue?

A merge of data records can be simulated only for tables in which
exactly one key field will be converted. However table &v1& has more
than one key field that will be converted.

System Response

No simulation takes place for this table.

How to fix this error?

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.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV20400015 - For table &1, there is more than one key field for convers; no simulation ?

  The SAP error message CNV20400015 indicates that there is an issue with the conversion of data for a specific table during a data migration or conversion process. The message states that there is more than one key field for the specified table, which complicates the conversion process and prevents simulation.
  Cause:
  This error typically arises in the context of data migration or conversion projects, particularly when using SAP's Conversion Tools (like the SAP S/4HANA Migration Cockpit or other data migration tools). The specific causes include:
  
  Multiple Key Fields: The table in question has more than one key field defined, which can lead to ambiguity in identifying unique records during the conversion process.
  Configuration Issues: The configuration of the migration or conversion process may not be set up to handle tables with composite keys properly.
  Data Model Changes: Changes in the data model between the source and target systems may lead to discrepancies in how keys are defined.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review Table Structure: Check the structure of the table in question to understand its key fields. You can do this using transaction codes like SE11 (Data Dictionary) to view the table definition.
  
  
  Adjust Migration Settings: If you are using a migration tool, ensure that the settings are correctly configured to handle tables with multiple key fields. This may involve specifying how to handle composite keys or adjusting the mapping.
  
  
  Data Preparation: If possible, prepare the data in such a way that it can be uniquely identified. This might involve creating a unique identifier in the source data that combines the values of the key fields.
  
  
  Consult Documentation: Refer to the SAP documentation for the specific migration tool you are using. There may be guidelines or best practices for handling tables with multiple key fields.
  
  
  Testing: After making adjustments, run a test migration or simulation to ensure that the error does not occur again.
  
  
  Seek Support: If the issue persists, consider reaching out to SAP support or consulting with an SAP expert who has experience with data migration projects.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance.
  Migration Cockpit: Familiarize yourself with the SAP S/4HANA Migration Cockpit and its capabilities, especially regarding handling complex data structures.
  Data Dictionary: Understanding the data dictionary and how key fields are defined in SAP can help in troubleshooting similar issues in the future.
  
  By following these steps, you should be able to address the CNV20400015 error and successfully proceed with your data migration or conversion process.