Field Symbols help

HI,

i have to use read for table type field-symbols

i try

FIELD-SYMBOLS: <col_actual>  TYPE STANDARD TABLE,
<t_act> type any.
 
READ TABLE <col_actual>  ASSIGNING  <t_act> WITH KEY child = wa_node_tab-znode.

and i get error :

The specified type has no structure and therefore no component called"CHILD". component called "CHILD".

and in debugger i have Colman with name child.

what i wont is to use value of colman child in table <col_actual> for with key

how can i solve it?

Regards