How To Fix SWF_FLEX_DEF121 - Do not change super class. Please create own class which inherits from &1

SWF_FLEX_DEF121 - Overview

• Message type: E = Error

• Message class: SWF_FLEX_DEF -

• Message number: 121

• Message text: Do not change super class. Please create own class which inherits from &1

What causes this issue?

Super class CL_SWF_FLEX_IFS_RUN_APPL_BASE should not be changed.

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

System Response

How to fix this error?

Create a new class in SE24 which inherits form super class
CL_SWF_FLEX_IFS_RUN_APPL_BASE. Then you can redefine and adapt the
method IF_SWF_FLEX_IFS_RUN_APPL~RESULT_CALLBACK.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

SWF_FLEX_DEF121 - Details

• The SAP error message SWF_FLEX_DEF121 indicates that there is an attempt to modify a superclass in a way that is not allowed. This typically occurs in the context of workflow development in SAP, particularly when dealing with class inheritance in ABAP (Advanced Business Application Programming).
  
  Cause:
  The error arises when a developer tries to change the definition of a superclass directly, which is not permitted. Instead, the system expects the developer to create a new class that inherits from the existing superclass. This is a safeguard to maintain the integrity of the superclass and ensure that all subclasses behave consistently.
  
  Solution:
  To resolve this error, follow these steps:
  
  
  Create a New Class: Instead of modifying the superclass, create a new class that inherits from the specified superclass (denoted as &1 in the error message). You can do this by using the ABAP Class Builder (transaction SE24).
  
  
  Define Inheritance: When creating the new class, specify the superclass