How To Fix MC406 - Error from consistency layer (& - &)

SAP Error Message - Details

• Message type: E = Error

• Message class: MC - Aggregate: views, matchcodes, lock objects

• Message number: 406

• Message text: Error from consistency layer (& - &)

What causes this issue?

The standardized interface between the database and the ABAP/4
Dictionary returned an error.

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?

There might be a database error. Try to read the data again.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MC406 - Error from consistency layer (& - &) ?

  The SAP error message MC406, which indicates an error from the consistency layer, typically arises in the context of the SAP Material Management (MM) or Production Planning (PP) modules. This error often occurs during the execution of certain transactions or reports that involve data consistency checks, particularly when dealing with material master data, inventory management, or production orders.
  Cause:
  The MC406 error can be caused by several factors, including:
  
  
  Data Inconsistencies: There may be inconsistencies in the data stored in the database, such as missing or incorrect entries in the material master, inventory records, or other related tables.
  
  
  Configuration Issues: Incorrect configuration settings in the system can lead to inconsistencies, especially if there have been recent changes to the system or updates that were not properly applied.
  
  
  Custom Developments: If there are custom programs or enhancements that interact with standard SAP processes, they may inadvertently cause data inconsistencies.
  
  
  Database Issues: Problems with the underlying database, such as corruption or locking issues, can also lead to this error.
  
  
  Solution:
  To resolve the MC406 error, you can take the following steps:
  
  
  Check Data Consistency: Use transaction codes like MM03 (Display Material) or MB52 (List Warehouse Stocks on Hand) to check the material master and inventory data for inconsistencies. Look for missing or incorrect entries.
  
  
  Run Consistency Checks: Use the transaction MC22 (Consistency Check) to identify and correct inconsistencies in the data. This transaction can help you find issues related to material master data.
  
  
  Review Configuration: Check the configuration settings in the relevant modules (MM, PP) to ensure they are set up correctly. Look for any recent changes that might have introduced inconsistencies.
  
  
  Analyze Custom Code: If there are custom developments, review the code to ensure it is not causing data inconsistencies. Debugging the custom code may help identify the root cause.
  
  
  Database Maintenance: If you suspect database issues, consider running database maintenance tasks or consulting with your database administrator to check for corruption or locking issues.
  
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address the MC406 error. There may be specific patches or updates that can resolve the issue.
  
  
  Contact SAP Support: If the issue persists after trying the above steps, consider reaching out to SAP Support for further assistance. Provide them with detailed information about the error, including transaction codes, steps to reproduce the error, and any relevant logs.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MM03, MB52, MC22, and others that can help in diagnosing and resolving the issue.
  SAP Documentation: Review SAP documentation related to the specific modules (MM, PP) for best practices on data management and consistency checks.
  User Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to identify and resolve the underlying cause of the MC406 error in your SAP system.