How To Fix AD612 - Table & already contains tables: Class cannot be changed

SAP Error Message - Details

• Message type: E = Error

• Message class: AD - Data Dictionary application messages

• Message number: 612

• Message text: Table & already contains tables: Class cannot be changed

What causes this issue?

You want to change the table type of a table pool already containing
pooled tables. This is not allowed.

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?

Please check whether this change is necessary.
If it is, you should delete all pooled tables from this pool.
You cannot delete pooled tables whilst they contain data.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AD612 - Table & already contains tables: Class cannot be changed ?

  The SAP error message AD612 indicates that you are trying to change the class of a table that already contains data. This is a restriction in SAP to ensure data integrity and consistency. When a table is created, it is assigned a specific class (e.g., transparent table, pooled table, etc.), and changing this class after data has been inserted can lead to complications.
  Cause:
  The error occurs when:
  
  You attempt to change the table type (class) of a database table that already has entries.
  The system prevents this change to avoid potential data loss or corruption.
  
  Solution:
  To resolve this issue, you can follow these steps:
  
  
  Check Table Contents: Verify if the table indeed contains data. You can do this by executing a simple SELECT query in the database.
  
  
  Delete Data: If the table contains data that you can afford to lose, you can delete all entries from the table. This can be done using a DELETE statement in the database or through transaction codes like SE14 (Database Utility).
  
  
  Change Table Class: Once the table is empty, you can proceed to change the class of the table as needed.
  
  
  Repopulate Data: If you deleted data, ensure you have a backup or a way to repopulate the table with the necessary data after changing the class.
  
  
  Use Transport Requests: If this change is part of a development or transport request, ensure that the changes are properly documented and transported to the relevant systems.
  
  
  Related Information:
  
  
  Transaction Codes: 
  
  SE11: Data Dictionary to view and modify table definitions.
  SE14: Database Utility for managing database objects.
  
  
  
  Documentation: Refer to SAP Help documentation for more details on database table management and restrictions related to table classes.
  
  
  Best Practices: Always ensure that you have backups of your data before making structural changes to database tables. Consider using version control for your database schema changes.
  
  
  If you continue to face issues or if the data is critical, it may be advisable to consult with your SAP Basis or ABAP team for further assistance.