How To Fix WD478 - End of error list reached

SAP Error Message - Details

• Message type: E = Error

• Message class: WD - Workflow definition

• Message number: 478

• Message text: End of error list reached

Self-Explanatory Message

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• What is the cause and solution for SAP error message WD478 - End of error list reached ?

  SAP Error Message:
  
  WD478 - End of error list reached
  
  Cause:
  The error message WD478 typically occurs in the context of SAP Web Dynpro applications. It indicates that the system has reached the end of an error list during error processing or validation, and there are no more errors to display or process.
  More specifically, this message is often encountered when:
  
  The Web Dynpro framework tries to fetch the next error from an internal error list but finds none.
  The error list (e.g., from a validation or message container) has been exhausted.
  There might be a programming or configuration issue where the application expects more errors but none are available.
  
  
  Explanation:
  In Web Dynpro applications, error messages are collected in an error list or message container during processing (e.g., input validation). When the framework or custom code iterates over this list to display or handle errors, it uses an internal pointer or index. When this pointer reaches the end of the list, the system throws the WD478 message to indicate no more errors are available.
  
  Solution:
  
  
  Check the Error Handling Logic:
  
  Review the Web Dynpro component or application code where error messages are collected and processed.
  Ensure that the code correctly checks for the presence of errors before trying to access them.
  Avoid calling methods like GET_NEXT_ERROR or similar without verifying that errors exist.
  
  
  
  Validate Message Container Usage:
  
  If you are using a message container or message manager, verify that errors are properly added before attempting to read them.
  Make sure the error list is not empty when iterating.
  
  
  
  Debug the Application:
  
  Use the debugger to trace the point where the error list is accessed.
  Check the size of the error list and the current index/pointer.
  Identify why the application tries to fetch an error beyond the last one.
  
  
  
  Check for Custom Code Issues:
  
  If custom code manipulates the error list, ensure it handles boundary conditions correctly.
  Avoid off-by-one errors when iterating over error messages.
  
  
  
  SAP Notes and Patches:
  
  Search for relevant SAP Notes if this error occurs in standard SAP Web Dynpro applications.
  Apply any recommended patches or corrections.
  
  
  
  
  Related Information:
  
  Message Class: WD (Web Dynpro)
  Context: Web Dynpro ABAP applications, error handling, message processing.
  Typical Scenario: Input validation, form processing, or any scenario where multiple errors are collected and displayed.
  SAP Documentation: Look into SAP Web Dynpro ABAP documentation on error handling and message containers.
  Debugging Tips: Use breakpoints in the error processing methods to inspect the error list and index.
  
  
  Summary:
  
  Cause: Attempt to access an error beyond the last one in the error list.
  Solution: Correct error handling logic to check for errors before accessing them; debug and fix any off-by-one or empty list issues.
  Additional: Review SAP Notes and Web Dynpro error handling best practices.
  
  
  If you provide more context (e.g., the exact scenario or code snippet), I can help with a more tailored solution.