How To Fix KN406 - Summarization levels faulty (&1 &2, see long text)

SAP Error Message - Details

• Message type: E = Error

• Message class: KN - Reporting for Costing

• Message number: 406

• Message text: Summarization levels faulty (&1 &2, see long text)

What causes this issue?

The summarization levels that are updated by data collection contain
errors.

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

System Response

Data collection could not be carried out.

How to fix this error?

Delete all summarization levels. Then carry out a new data collection
run for the entire reporting time frame.
If the error recurs, report the following information in addition to the
error number of this message:
Status of summarization level 1: &V1&
Status of summarization level 2: &V2&

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message KN406 - Summarization levels faulty (&1 &2, see long text) ?

  The SAP error message KN406 ("Summarization levels faulty (&1 &2, see long text)") typically occurs in the context of the SAP system's handling of customer master data, particularly when there are issues with the summarization levels for customer data in the system.
  Cause:
  The error is usually caused by one of the following issues:
  
  Incorrect Configuration: The summarization levels for customer master data may not be correctly configured in the system.
  Data Inconsistencies: There may be inconsistencies or missing entries in the summarization levels table, which can lead to this error.
  Custom Development: If there are custom developments or modifications in the system that affect how customer data is summarized, this could lead to errors.
  Transport Issues: If the configuration or data was transported from one system to another (e.g., from development to production), there may have been issues during the transport process.
  
  Solution:
  To resolve the KN406 error, you can take the following steps:
  
  
  Check Configuration:
  
  Go to the configuration settings for customer master data summarization levels in the SAP system. Ensure that the summarization levels are correctly defined and active.
  Use transaction code SPRO to access the configuration settings and navigate to the relevant sections for customer master data.
  
  
  
  Review Data:
  
  Check the relevant tables (e.g., KNA1, KNB1) for any inconsistencies or missing entries related to summarization levels.
  Use transaction codes like SE11 to view the data in the tables and identify any discrepancies.
  
  
  
  Analyze Custom Code:
  
  If there are any custom programs or enhancements that interact with customer master data, review the code to ensure it is functioning correctly and not causing the error.
  
  
  
  Transport Check:
  
  If the issue arose after a transport, verify that all necessary objects were transported correctly. Check for any missing dependencies or objects that may not have been included in the transport.
  
  
  
  Consult SAP Notes:
  
  Search the SAP Support Portal for any relevant SAP Notes that may address this specific error. There may be patches or updates available that can resolve the issue.
  
  
  
  Contact SAP Support:
  
  If the issue persists after checking the above points, consider reaching out to SAP Support for further assistance. Provide them with the error message details and any relevant information about your system configuration.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SE11 (Data Dictionary), SPRO (Customizing), and SE80 (Object Navigator) for troubleshooting.
  Documentation: Review SAP documentation related to customer master data management and summarization levels for a deeper understanding of the configuration and data structure.
  Testing: After making any changes, ensure to test the system thoroughly to confirm that the error has been resolved and that there are no side effects.
  
  By following these steps, you should be able to identify and resolve the cause of the KN406 error in your SAP system.