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

MC306 - Overview

• 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.

MC306 - Details

• 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