ALV default value

Hi all,

how to add new row to ALV list with some fields filled with default values?

It would work with edit event registered as modification

"CALL METHOD go_grid_310->register_edit_event

EXPORTING

i_event_id = cl_gui_alv_grid=>mc_evt_modified"

but then adding new record to ALV automatically calls check_changed_data and if other fields are empty error protocol is returned.....before user enter any data into new ALV row.

Thanks

J.