How To Fix WD475 - Choose a valid line

SAP Error Message - Details

• Message type: E = Error

• Message class: WD - Workflow definition

• Message number: 475

• Message text: Choose a valid line

What causes this issue?

You want to execute a line operation, for example <LS>cut</>, <LS>paste
</> or <LS>select</>, but you have not selected a line from a list.

System Response

The system cannot execute the line operation.

How to fix this error?

Please select a line from a list and select this operation again.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WD475 - Choose a valid line ?

  Certainly! Here's a detailed explanation for the SAP error message WD475 - "Choose a valid line":
  
  SAP Error Message: WD475 - "Choose a valid line"
  
  Cause:
  The error message WD475 typically occurs in the context of Web Dynpro applications when a user action expects a valid table row or list item to be selected, but no valid line (row) is currently selected.
  Common scenarios include:
  
  The user tries to perform an operation (e.g., edit, delete, or display details) on a table or list without selecting any row.
  The selected row index is invalid or out of range.
  The context node or UI element that holds the table data does not have a current element set.
  The application logic expects a valid line to be chosen before proceeding, but the selection is empty or incorrect.
  
  
  Solution:
  To resolve the WD475 error, consider the following steps:
  
  
  Ensure a Row is Selected:
  
  Before performing actions that require a selected line, check if the user has selected a row.
  Add validation in the event handler to verify the selection index or context element.
  
  
  
  Check Context Binding:
  
  Verify that the context node bound to the table or list has a current element set.
  If the current element is not set, set it programmatically before proceeding.
  
  
  
  UI Improvements:
  
  Disable action buttons (e.g., Edit, Delete) until a valid line is selected.
  Provide user feedback or messages prompting the user to select a line.
  
  
  
  Code Example (Web Dynpro ABAP):
  DATA: lo_nd_table TYPE REF TO if_wd_context_node,
        lo_el_table TYPE ref to if_wd_context_element.
  
  lo_nd_table = wd_context->get_child_node( name = 'TableNode' ).
  lo_el_table = lo_nd_table->get_element( ).
  
  IF lo_el_table IS INITIAL.
    MESSAGE e475(00) WITH 'Choose a valid line'.
    RETURN.
  ENDIF.
  
  
  Debugging:
  
  Use the debugger to check the context node and current element at the point where the error occurs.
  Confirm that the UI element (e.g., table) has a selected row and that the selection is passed correctly to the backend.
  
  
  
  
  Related Information:
  
  Message Class: WD (Web Dynpro)
  Message Number: 475
  Context: Web Dynpro ABAP applications, especially when working with tables or lists.
  SAP Notes: Check for any SAP Notes related to WD475 if the issue persists after validation.
  User Training: Educate users to select a line before performing actions that require a selection.
  
  
  Summary:
  The WD475 "Choose a valid line" error occurs when an operation requires a selected row in a Web Dynpro table or list, but no valid selection exists. The solution involves ensuring a valid row is selected before proceeding, validating the selection in the code, and improving the UI to guide users accordingly.
  
  If you need help with a specific Web Dynpro application or code snippet, feel free to provide more details!