Subnode: does not exist error in web dynpro abap

Hi Experts,
I am facing this error "Subnode FIRST_VIEW.RadioGroup does not exist ".
The Selection method and wdDoInit method code as below
method ONACTIONSELECT_ITEM .
DATA:
        ItemNode TYPE REF TO IF_WD_Context_Node,
        Item_Element TYPE REF TO IF_wd_Context_Element,
        Item_Index type i,
        Item type String,
        ItemList type STANDARD TABLE OF IF_First_View=>Element_RadioGroup,
        wList LIKE LINE OF ItemList.
ItemNode = Wd_Context->get_Child_Node( NAME = 'RadioGroup' ).
ItemNode->get_Static_Attributes_Table( importing table = ItemList ).
Item_Index = ItemNode->get_Lead_Selection_Index( ).
clear wList.
read table ItemList into wList Index Item_Index.
Item = wList-ebeln.
wd_Context->set_Attribute( exporting value = Item
                                     NAME = 'Text_View' ).
endmethod.
method WDDOINIT .
DATA:
        Item_Node type ref to IF_WD_Context_Node ,
        Item_Element type REF TO IF_WD_Context_Element,
        Item_Index TYPE i,
        Item type String,
        itemList type STANDARD TABLE OF IF_FIRST_VIEW=>Element_Radiogroup,
        wlist like line of itemList.
appending the element list into the itemlist
wlist-ebeln = '0007' .
append wlist to itemList.
wlist-ebeln = '0008' .
append wlist to itemList.
wlist-ebeln = '0009'.
append wlist to itemList.
Item_Node = wd_Context->get_Child_Node( NAME = 'RadioGroup' ).
Item_Node->bind_table( itemList ).
Item_Node->set_Lead_Selection_Index( 3 ).
Item_Index = Item_Node->get_Lead_Selection_Index( ).
clear wlist.
READ TABLE itemList into wlist INDEX Item_Index .
Item = wlist-ebeln.
wd_Context->set_Attribute( exporting value = item
                             NAME = 'text_view' ).
endmethod.

Hi Neel,
Please check the context node FIRST_VIEW and subnode RadioGroup create manually under cotext node tab.
Best Regards
Arun Jaiswal

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Friends,
I have written the following code in WDDOINIT method of view controller.
method WDDOINIT .
types: begin of zs,
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Subnode: does not exist error in web dynpro abap

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