How To Fix WD385 - Class '&' must have 'public' entered as the instance generation

SAP Error Message - Details

• Message type: E = Error

• Message class: WD - Workflow definition

• Message number: 385

• Message text: Class '&' must have 'public' entered as the instance generation

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Smart SAP Assistant

• What is the cause and solution for SAP error message WD385 - Class '&' must have 'public' entered as the instance generation ?

  The SAP error message:
  WD385 Class '&' must have 'public' entered as the instance generation
  typically occurs in the context of Web Dynpro ABAP development.
  
  Cause
  This error arises when a Web Dynpro component or controller class is defined with an incorrect instance generation visibility. In Web Dynpro ABAP, certain classes (especially controllers and components) must be declared with public instance generation to allow the framework to instantiate them properly.
  If the class is set to protected or private instance generation, the Web Dynpro runtime cannot create instances of the class, leading to this error.
  
  Explanation of Terms
  
  Instance Generation: This refers to the visibility of the constructor of the class, i.e., who can create instances of the class.
  Public Instance Generation: The class can be instantiated from anywhere.
  Protected/Private Instance Generation: The class can only be instantiated from within the class itself or its subclasses (protected) or only within the class itself (private).
  
  
  Solution
  
  
  Change the instance generation of the class to public:
  
  Go to the ABAP Class Builder (transaction SE24).
  Enter the class name mentioned in the error message.
  Choose Change mode.
  Go to the Properties tab.
  Find the Instance Generation setting.
  Set it to Public.
  Save and activate the class.
  
  
  
  If the class is generated by Web Dynpro (e.g., component controller, window controller), ensure that the component/controller is properly generated and not manually changed to protected/private instance generation.
  
  
  Regenerate the Web Dynpro component if necessary:
  
  Sometimes, after changes in the component or its controllers, regeneration is needed.
  Use the Web Dynpro component editor to regenerate the component.
  
  
  
  
  Additional Information
  
  This error is common when manually creating or modifying Web Dynpro classes or when importing components from other systems.
  The Web Dynpro framework requires public instance generation to instantiate controllers and components dynamically at runtime.
  If you are working with custom controllers or components, always ensure their instance generation is public.
  This error can also appear during runtime if the class definition is inconsistent with the Web Dynpro framework expectations.
  
  
  Summary
  
  
  
  Aspect
  Details
  
  
  
  
  Cause
  Class instance generation is not public
  
  
  Effect
  Web Dynpro runtime cannot instantiate class
  
  
  Solution
  Set class instance generation to public in SE24
  
  
  Related Areas
  Web Dynpro ABAP components, controllers
  
  
  
  
  If you provide the exact class name or context, I can help with more specific instructions.