Hi,
Thank you Eitan for your reply.
I managed to solve the problem.
I just needed to add the structure name to the prcfk parameter which contains the field name.
Now it's working fine.
CONCATENATE '<result_fields>-/bic/' wa_tab-prckf INTO prckf.
ASSIGN (prckf) TO <prckf>.
IF sy-subrc = 0.
MOVE <result_fields>-/bic/zordv_dc TO <prckf>.
ENDIF.