How To Fix WD804 - Evaluate rule with function '&1' and path '&2'

WD804 - Overview

• Message type: E = Error

• Message class: WD - Workflow definition

• Message number: 804

• Message text: Evaluate rule with function '&1' and path '&2'

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WD804 - Evaluate rule with function '&1' and path '&2' ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  WD804 Evaluate rule with function '&1' and path '&2'
  
  
  Cause:
  This error occurs in the Web Dynpro ABAP framework when the system tries to evaluate a rule (usually in a context mapping or UI element property) using a function module or method identified by &1 and a path &2, but the evaluation fails. The placeholders &1 and &2 are replaced at runtime with the actual function name and path.
  Common causes include:
  
  The function or method specified in the rule does not exist or is not accessible.
  The path provided is incorrect or does not point to a valid context node or attribute.
  The rule logic contains syntax errors or invalid expressions.
  Missing or incorrect import/export parameters in the function.
  The context node or attribute referenced is not yet instantiated or is null.
  Authorization or runtime errors during the function execution.
  
  
  
  Solution:
  To resolve this error, follow these steps:
  
  
  Check the