How To Fix OO421 - Class &1 contains stored procedures. No support for enhancements

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 421

• Message text: Class &1 contains stored procedures. No support for enhancements

What causes this issue?

There is currently no enhancement support for classes containing ABAP
Managed Database Procedures.
The class &v1& implements the interface IF_AMDP_MARKER_HDB. This means,
it provides the option to add ABAP Managed Database Procedures to the
class.

System Response

Class Builder remains in display mode.

How to fix this error?

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

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message OO421 - Class &1 contains stored procedures. No support for enhancements ?

  The SAP error message OO421 indicates that you are trying to enhance a class that contains stored procedures, which is not supported in the SAP system. This typically occurs when you attempt to create an enhancement or modification to a class that has been defined with stored procedures, as the system does not allow enhancements in such cases.
  Cause:
  
  Stored Procedures: The class you are trying to enhance contains stored procedures, which are not compatible with the enhancement framework in SAP.
  Enhancement Restrictions: SAP has certain restrictions on enhancing classes that include stored procedures to maintain data integrity and system stability.
  
  Solution:
  
  Review Class Design: Check if the class design can be modified to avoid the use of stored procedures. If possible, refactor the class to eliminate stored procedures.
  Use Alternative Approaches: Instead of enhancing the class directly, consider using other methods such as:
  
  Subclasses: Create a subclass that extends the functionality of the original class without modifying it directly.
  Wrapper Classes: Implement a wrapper class that interacts with the original class and provides the additional functionality you need.
  
  
  Consult Documentation: Review SAP documentation for any specific guidelines or best practices regarding enhancements and stored procedures.
  Contact SAP Support: If you believe that your use case is valid and requires a different approach, consider reaching out to SAP support for guidance.
  
  Related Information:
  
  SAP Enhancement Framework: Familiarize yourself with the SAP enhancement framework, which provides guidelines on how to properly enhance classes and methods.
  ABAP Development Guidelines: Review ABAP development guidelines to understand the best practices for class design and enhancement.
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or updates regarding this error message.
  
  By following these steps, you should be able to address the OO421 error and find a suitable solution for your enhancement needs.