How To Fix CNV_20306_CHECK026 - Implicit controlling area merge into controlling area &1 found

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_20306_CHECK - Message Class for package CNV_20306_CHECK

• Message number: 026

• Message text: Implicit controlling area merge into controlling area &1 found

What causes this issue?

An <DS:TX.CNV_MBT_IMPLICIT_MERGE>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 key of the target is
stored in the context of this message. The keys of the source values can
be found in the context of the related messages.
You cannot run the transformation solution Controlling Area Merge
because certain prerequisites have not been met. Please change your
mapping accordingly.

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_20306_CHECK026 - Implicit controlling area merge into controlling area &1 found ?

  The SAP error message CNV_20306_CHECK026 indicates that there is an implicit merge of controlling areas during a data migration or conversion process. This typically occurs in the context of SAP S/4HANA migrations or when using the SAP Conversion Tools.
  Cause:
  The error arises when the system detects that two or more controlling areas are being implicitly merged. This can happen due to:
  
  Data Consistency Issues: There may be inconsistencies in the data that lead to the system interpreting that multiple controlling areas should be merged.
  Configuration Errors: Incorrect configuration settings in the controlling area or related financial settings can lead to this error.
  Migration Settings: During a migration process, if the settings for controlling areas are not correctly defined, it can lead to implicit merges.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Configuration: Review the configuration of the controlling areas in your SAP system. Ensure that each controlling area is correctly defined and that there are no overlaps or inconsistencies.
  
  
  Data Validation: Validate the data in the controlling areas. Look for any entries that might be causing the implicit merge. This may involve checking for duplicate entries or incorrect assignments.
  
  
  Review Migration Settings: If you are in the process of migrating data, review the migration settings and ensure that the controlling areas are correctly specified. Make sure that the mapping of controlling areas is accurate.
  
  
  Consult Documentation: Refer to the SAP documentation related to the specific migration or conversion process you are undertaking. There may be specific guidelines or notes that address this error.
  
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or patches related to this error. You can search for notes in the SAP Support Portal.
  
  
  Engage SAP Support: If the issue persists after checking the above points, consider reaching out to SAP Support for assistance. They can provide more detailed analysis and guidance based on your specific system configuration and data.
  
  
  Related Information:
  
  Transaction Codes: You may want to use transaction codes like OBY6 (for controlling area settings) or OKKP (for controlling area configuration) to review and adjust your settings.
  Migration Tools: If you are using specific migration tools (like SAP S/4HANA Migration Cockpit), ensure that you are following the recommended procedures and guidelines.
  Testing: After making changes, conduct thorough testing to ensure that the issue is resolved and that there are no further implications on the financial data.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.