How To Fix CNVA_20400_CHECK090 - An implicit merge into a controlling area was detected.

SAP Error Message - Details

• Message type: E = Error

• Message class: CNVA_20400_CHECK - Messages for contorlling areas checks

• Message number: 090

• Message text: An implicit merge into a controlling area was detected.

An implicit merge into a controlling area was detected. This happens
when controlling areas will be merged, but the mapping only contains a
part of the source controlling areas. To avoid unwanted merges, you must
specify mapping values for all the source values of the target
controlling area. The affected target controlling areas are stored in
the output table of the duplicate master data check.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNVA_20400_CHECK090 - An implicit merge into a controlling area was detected. ?

  The SAP error message CNVA_20400_CHECK090 indicates that an implicit merge into a controlling area has been detected. This typically occurs during the process of data migration or when working with controlling area settings in SAP. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  Implicit Merge: The error suggests that there is an attempt to merge data from different controlling areas without explicit instructions. This can happen if the system detects that the same cost center or internal order is being assigned to multiple controlling areas.
  Configuration Issues: There may be inconsistencies in the configuration of controlling areas, such as overlapping settings or incorrect assignments.
  Data Migration: If you are migrating data from one system to another, the data may not be correctly aligned with the controlling area settings in the target system.
  
  Solution:
  
  
  Check Controlling Area Assignments:
  
  Review the assignments of cost centers, internal orders, and other objects to ensure they are correctly assigned to the appropriate controlling areas.
  Use transaction codes like OKKP (Controlling Area) to check the configuration.
  
  
  
  Data Consistency Check:
  
  Perform a consistency check on the data being migrated or processed. Ensure that there are no duplicate entries or conflicts in the controlling area assignments.
  
  
  
  Adjust Migration Settings:
  
  If you are in the process of migrating data, ensure that the migration settings are correctly configured to avoid implicit merges. This may involve adjusting the mapping of controlling areas.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to controlling area configuration and data migration for specific guidelines and best practices.
  
  
  
  Error Logs:
  
  Check the error logs for more detailed information about the specific entries causing the issue. This can provide insights into which objects are involved in the implicit merge.
  
  
  
  SAP Support:
  
  If the issue persists, consider reaching out to SAP support for assistance. They can provide more tailored guidance based on your specific system configuration and the context of the error.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as OKKP (Controlling Area), KSV5 (Display Cost Center), and KSB1 (Cost Centers: Actual Line Items) to analyze and manage controlling area settings.
  SAP Notes: Search for SAP Notes related to error CNVA_20400 or controlling area configuration for additional insights and potential patches or updates.
  Documentation: Review SAP Help documentation on controlling areas and data migration processes to understand the implications of controlling area settings.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.