How To Fix WS_TOOL194 - Multiple row selection not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: WS_TOOL - Message Class for Web Services and Virtual Endpoints

• Message number: 194

• Message text: Multiple row selection not possible

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WS_TOOL194 - Multiple row selection not possible ?

  Certainly! Here's a detailed explanation regarding the SAP error message WS_TOOL194: Multiple row selection not possible:
  
  Error Message
  WS_TOOL194: Multiple row selection not possible
  
  Cause
  This error occurs when a user attempts to select multiple rows in a SAP ALV (ABAP List Viewer) grid or table control where the configuration or the underlying program logic does not allow multiple row selections. 
  In other words, the ALV or the custom table control is set up to permit only single row selection, but the user tries to select more than one row simultaneously (e.g., by holding Ctrl or Shift and clicking multiple rows).
  
  When does it typically occur?
  
  In ALV reports or custom table controls where the selection mode is set to single selection.
  When the program logic or the ALV grid configuration explicitly restricts selection to one row.
  When the user interface or event handler does not support multiple selections.
  
  
  Solution
  To resolve this error, you need to adjust the selection mode of the ALV or table control to allow multiple row selections, or restrict the user to select only one row.
  Steps to fix:
  
  
  Check ALV Grid or Table Control Settings:
  
  For ALV Grid (using CL_GUI_ALV_GRID), check the layout or selection mode settings.
  For example, in the layout structure (LVC_S_LAYO), the field sel_mode controls the selection mode:
  
  'S' = Single selection
  'M' = Multiple selection
  
  
  
  DATA: layout TYPE lvc_s_layo.
  layout-sel_mode = 'M'. " Allow multiple selection
  CALL METHOD alv_grid->set_table_for_first_display
    EXPORTING
      is_layout = layout
      ...
  
  
  Adjust the program logic:
  
  If the program logic expects only one row, ensure the UI restricts selection to single row.
  If multiple rows are needed, update the logic to handle multiple selections.
  
  
  
  Check event handling:
  
  If the error occurs during event processing (e.g., double-click or user command), verify that the event handler supports multiple rows.
  Use methods like get_selected_rows to retrieve multiple selected rows.
  
  
  
  User training:
  
  Inform users about the selection mode if multiple selection is not supported.
  
  
  
  
  Related Information
  
  
  ALV Selection Modes:
  
  
  
  Value
  Description
  
  
  
  
  'S'
  Single row selection
  
  
  'M'
  Multiple selection
  
  
  
  
  
  SAP Notes / Documentation:
  
  SAP Help on ALV Grid Control and selection modes.
  SAP Community posts on handling multiple row selection in ALV.
  
  
  
  Common ABAP Classes:
  
  CL_GUI_ALV_GRID
  CL_SALV_TABLE (for SALV model ALV)
  
  
  
  
  Summary
  
  
  
  Aspect
  Description
  
  
  
  
  Cause
  User tries to select multiple rows but ALV/table control allows only single selection.
  
  
  Solution
  Change ALV layout selection mode to multiple (sel_mode = 'M') or restrict user to single selection. Adjust program logic accordingly.
  
  
  Notes
  Check ALV grid/table control settings and event handlers.
  
  
  
  
  If you provide the specific program or ALV type you are working with, I can help with a more tailored solution or code snippet.