How To Fix WER233 - At least one selection field must be declared

SAP Error Message - Details

• Message type: E = Error

• Message class: WER - Messages for the package WER

• Message number: 233

• Message text: At least one selection field must be declared

Self-Explanatory Message

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• What is the cause and solution for SAP error message WER233 - At least one selection field must be declared ?

  SAP Error Message:
  
  WER233 - At least one selection field must be declared
  
  Cause:
  This error occurs when you are defining a selection screen (usually in a report or module pool program) and the selection screen does not contain any selection fields. SAP requires that at least one selection field (such as a parameter or select-option) be declared on the selection screen. If none are declared, the system raises this error.
  
  When does it occur?
  
  When you create a selection screen using SELECTION-SCREEN statements but do not declare any PARAMETERS or SELECT-OPTIONS.
  When you try to execute or generate a report/module pool with an empty selection screen.
  Sometimes it can also occur if all declared selection fields are commented out or conditionally excluded, resulting in no active selection fields.
  
  
  Solution:
  
  
  Declare at least one selection field on the selection screen. For example:
  PARAMETERS p_matnr TYPE matnr.
  or
  SELECT-OPTIONS s_matnr FOR mara-matnr.
  
  
  If you intentionally want no selection fields, reconsider your design because SAP requires at least one selection field for selection screens.
  
  
  If the selection screen is dynamically created, ensure that the logic to add selection fields is executed properly.
  
  
  Check for conditional compilation or code that might be excluding all selection fields.
  
  
  
  Additional Information:
  
  The error message is part of the selection screen validation.
  The message class is usually WER (Selection Screen).
  This is a compile-time or runtime error depending on when the selection screen is processed.
  If you want a report without any selection screen, you can avoid using SELECTION-SCREEN statements altogether.
  For complex selection screens, ensure that at least one PARAMETERS or SELECT-OPTIONS is present.
  
  
  Example:
  REPORT ztest.
  
  * This will cause WER233 error because no selection fields are declared
  SELECTION-SCREEN BEGIN OF BLOCK b1 WITH FRAME TITLE text-001.
  SELECTION-SCREEN END OF BLOCK b1.
  
  * Correct way:
  PARAMETERS p_matnr TYPE matnr.
  
  SELECTION-SCREEN BEGIN OF BLOCK b1 WITH FRAME TITLE text-001.
  SELECTION-SCREEN END OF BLOCK b1.
  
  If you provide your code snippet or context, I can help you identify exactly where the issue is.