How To Fix WD085 - XML persistence must be set up when using blocks

WD085 - Overview

• Message type: E = Error

• Message class: WD - Workflow definition

• Message number: 085

• Message text: XML persistence must be set up when using blocks

Self-Explanatory Message

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• What is the cause and solution for SAP error message WD085 - XML persistence must be set up when using blocks ?

  SAP Error Message:
  WD085 - XML persistence must be set up when using blocks
  
  
  Cause:
  This error occurs in Web Dynpro applications when you use blocks (UI elements that group other UI elements) but have not properly configured XML persistence for the component or view. 
  In Web Dynpro, XML persistence is a mechanism that stores the state of UI elements (like input fields, blocks, etc.) between requests. When blocks are used, the framework expects XML persistence to be enabled to maintain the state of these blocks across round-trips. If XML persistence is not set up, the framework cannot serialize/deserialize the UI state, leading to this error.
  
  Explanation:
  
  Blocks are container UI elements that can hold other UI elements.
  When blocks are used, the Web Dynpro runtime requires XML persistence to be enabled to save and restore the UI state.
  If XML persistence is not enabled, the runtime throws the WD085 error.
  
  
  
  Solution:
  
  
  Enable XML Persistence for the View or