How To Fix OO420 - Class/Interf. &1 contains stored procedures, cannot be changed in SAP GUI

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 420

• Message text: Class/Interf. &1 contains stored procedures, cannot be changed in SAP GUI

What causes this issue?

Changing classes/interfaces containing ABAP Managed Database Procedures
is not supported by Class Builder (in SAP GUI).
The class/interface &v1& implements or comprises the interface
IF_AMDP_MARKER_HDB. This means, it provides the option to add ABAP
Managed Database Procedures to the class/interface.

System Response

Class Builder remains in display mode.

How to fix this error?

Use ABAP development tools for SAP NetWeaver (ADT) to edit the
class/interface.

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 OO420 - Class/Interf. &1 contains stored procedures, cannot be changed in SAP GUI ?

  The SAP error message OO420 indicates that you are trying to modify a class or interface that contains stored procedures (also known as "method implementations") directly in the SAP GUI, which is not allowed. This restriction is in place because stored procedures are typically associated with database operations and require specific handling that cannot be performed through the standard GUI interface.
  
  Cause:
  
  Stored Procedures: The class or interface you are trying to modify contains stored procedures, which are defined in the database and cannot be edited through the SAP GUI.
  Development Environment: You might be using a development environment that does not support direct modifications to classes/interfaces with stored procedures.
  
  
  Solution:
  
  
  Use the Appropriate Tool: If you need to modify the stored procedures, you should use the appropriate database management tools or transaction codes that allow you to manage stored procedures. For example, you might need to use tools like SAP HANA Studio or other