How To Fix SWDP_WB_TOOL396 - Assistance class & does not inherit from &

SAP Error Message - Details

• Message type: E = Error

• Message class: SWDP_WB_TOOL - Web Dynpro: Messages for Workbench Tools

• Message number: 396

• Message text: Assistance class & does not inherit from &

What causes this issue?

The assistance class &V1& of the Web Dynpro component does not inherit
from the general Web Dynpro support class &V2&.
Class &V2& provides central functions, such as access to the text pool
for &V1& through the method IF_WD_COMPONENT_ASSISTANCE~GET_TEXT. The
text pool of &V1& should be used in th Web Dynpro controllers for
storing dynamic texts.

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?

We recommend deriving the assistance class &V1& from &V2& abzuleiten.
In addition, &V2& can be entered in the Class Builder as superclass for
the class &V1&.

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 SWDP_WB_TOOL396 - Assistance class & does not inherit from & ?

  The SAP error message SWDP_WB_TOOL396 typically indicates that there is an issue with the inheritance of an assistance class in the context of Web Dynpro ABAP. This error occurs when a class that is expected to inherit from another class does not do so correctly, which can lead to issues in the application.
  Cause:
  
  Incorrect Class Definition: The class defined in your Web Dynpro component may not be inheriting from the expected superclass. This can happen if the class is not properly defined in the ABAP Dictionary or if there is a typo in the class name.
  Missing Implementation: The class might be missing the necessary implementation or methods that are required by the superclass.
  Namespace Issues: If the class is in a different namespace or package that does not have the correct access rights, it may not be recognized as inheriting from the specified class.
  Transport Issues: If the class was transported from another system, there may be inconsistencies or missing dependencies.
  
  Solution:
  
  Check Class Definition: Verify that the class is correctly defined and that it inherits from the expected superclass. You can do this by navigating to the class in the ABAP Workbench (SE80 or SE24) and checking the inheritance settings.
  Correct Inheritance: If the class does not inherit from the correct superclass, modify the class definition to ensure it does. This can be done by editing the class in the ABAP Workbench.
  Implement Required Methods: Ensure that all required methods from the superclass are implemented in the subclass. If any methods are abstract in the superclass, they must be implemented in the subclass.
  Check Namespaces: Ensure that the class is in the correct namespace and that there are no access issues. If necessary, adjust the namespace or package settings.
  Transport Consistency: If the class was transported, check for any missing dependencies or inconsistencies. You may need to re-transport the class or its dependencies.
  Rebuild the Application: After making changes, rebuild the Web Dynpro application to ensure that all components are correctly compiled and linked.
  
  Related Information:
  
  Web Dynpro ABAP Documentation: Review the official SAP documentation for Web Dynpro ABAP to understand the inheritance model and class definitions.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Community Forums: Consider searching or posting on SAP Community forums for insights from other developers who may have encountered similar issues.
  
  By following these steps, you should be able to resolve the SWDP_WB_TOOL396 error and ensure that your Web Dynpro application functions correctly.