How To Fix MC306 - Matchcode pool & exists on the database but not in ABAP Dictionary

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 306

• Message text: Matchcode pool & exists on the database but not in ABAP Dictionary

What causes this issue?

The matchcode pool exists on the database, but there is no corresponding
definition in the ABAP/4 Dictionary.

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?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MC306 - Matchcode pool & exists on the database but not in ABAP Dictionary ?

  The SAP error message MC306 indicates that there is a mismatch between the database and the ABAP Dictionary regarding a matchcode pool. This typically occurs when a matchcode pool exists in the database but is not defined in the ABAP Dictionary, leading to inconsistencies.
  Cause:
  
  Database Changes: The matchcode pool may have been created directly in the database without corresponding entries in the ABAP Dictionary.
  Transport Issues: If the matchcode pool was transported from one system to another, it might not have been properly included in the transport request.
  Deletion or Modification: The matchcode pool might have been deleted or modified in the ABAP Dictionary, but the corresponding entries in the database were not updated or removed.
  System Upgrade: An upgrade or migration process may have led to inconsistencies between the database and the ABAP Dictionary.
  
  Solution:
  
  Check the Matchcode Pool: Use transaction SE11 (Data Dictionary) to check if the matchcode pool is defined. If it is missing, you may need to recreate it.
  Recreate the Matchcode Pool: If the matchcode pool is not defined in the ABAP Dictionary, you can create it again using transaction SE11 or SE78 (for matchcode objects).
  Synchronize Database and Dictionary: If the matchcode pool exists in the database but not in the ABAP Dictionary, you may need to synchronize them. This can involve:
  
  Deleting the matchcode pool from the database if it is no longer needed.
  Creating a new matchcode pool in the ABAP Dictionary that matches the existing database entry.
  
  
  Use Transaction SM30: You can also use transaction SM30 to maintain the matchcode pool entries and check for inconsistencies.
  Check Transport Requests: Ensure that all relevant transport requests have been properly imported and that the matchcode pool is included in the transport.
  Consult SAP Notes: Check for any relevant SAP Notes that may address this specific issue or provide additional guidance.
  
  Related Information:
  
  Transaction Codes:
  
  SE11: Data Dictionary
  SE78: Matchcode Objects
  SM30: Maintain Table Views
  
  
  SAP Notes: Search for SAP Notes related to matchcode pools and error MC306 for specific guidance or patches.
  Documentation: Review SAP documentation on matchcode pools and their management for best practices.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.