How To Fix OO660 - The system could not activate the persistent class & (see long text)

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 660

• Message text: The system could not activate the persistent class & (see long text)

What causes this issue?

You cannot activate a persistent class and another object
simultaneously for technical reasons.

System Response

The system did not activate the persistent class.

How to fix this error?

Activate the persistent class on its own.
Select this class only in the object list and choose the <ZK>Activate
</> function from the context menu.
Alternatively, activate the class in the Class Builder.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message OO660 - The system could not activate the persistent class & (see long text) ?

  The SAP error message OO660 indicates that the system could not activate a persistent class. This error typically occurs in the context of ABAP Object-Oriented programming, particularly when dealing with persistent classes that are meant to be stored in the database.
  Causes:
  
  Database Issues: There may be issues with the underlying database, such as connectivity problems or database inconsistencies.
  Class Definition Errors: The class definition may have errors, such as missing or incorrect attributes, methods, or annotations.
  Transport Issues: If the class was transported from another system, there may be inconsistencies or missing dependencies.
  Authorization Issues: The user may not have the necessary authorizations to activate the class.
  Naming Conflicts: There may be naming conflicts with other classes or database objects.
  Inconsistent State: The class may be in an inconsistent state due to previous activation attempts that failed.
  
  Solutions:
  
  Check the Long Text: The error message OO660 usually comes with a long text that provides more details about the specific issue. Review this text for clues.
  Review Class Definition: Check the class definition for any syntax errors or inconsistencies. Ensure that all attributes and methods are correctly defined.
  Check Database Connection: Ensure that the database is up and running and that there are no connectivity issues.
  Check Authorizations: Verify that the user has the necessary authorizations to activate the class.
  Transport Consistency: If the class was transported, check for any missing dependencies or inconsistencies in the transport.
  Re-activate the Class: Sometimes, simply trying to re-activate the class can resolve transient issues.
  Check for Naming Conflicts: Ensure that there are no naming conflicts with other classes or database objects.
  Consult SAP Notes: Look for relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like SE80 (Object Navigator) or SE24 (Class Builder) to investigate the class and its properties.
  Debugging: If necessary, you can use the ABAP debugger to step through the activation process and identify where it fails.
  SAP Community: Consider checking the SAP Community forums for similar issues and solutions shared by other users.
  SAP Support: If the issue persists and you cannot resolve it, consider reaching out to SAP Support for assistance.
  
  By following these steps, you should be able to identify the cause of the OO660 error and implement a solution.