Getting component name

Guys,
I want to find the component names of my dynamic table
ASSIGN COMPONENT sy-index
OF STRUCTURE <wa_table> TO <dyn_field>.
I know there are couple of threads but they are confusing, I tried using one of the method
ref_table_des ?=
cl_abap_typedescr=>describe_by_name( p_data = <t_dyn_table> ).
idetails[] = ref_table_des->components[].
but then I get an error as formal parameter p_data does not exist.

Check this Example.
DATA : sflighttype type ref to cl_abap_structdescr,
comp_tab type cl_abap_structdescr=>component_table.
field-symbols: <wa_comp> like line of comp_tab.
sflighttype ?= cl_abap_typedescr=>describe_by_name('SFLIGHT').
comp_tab = sflighttype->get_components( ).
LOOP AT comp_tab ASSIGNING <wa_comp>.
write : / <wa_comp>-name.
ENDLOOP.
In your case.
it should be
ref_table_des ?=
cl_abap_typedescr=>describe_by_name( <t_dyn_table> ).

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KN.

Hi,
Try removing iview and assiging back becoz error is saying that iview not found so remove iview and assign again
Regards
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