hxc_timestore_deposit.execute_deposit_process returns message_name = 4

I create timecards through the PL/SQL API. The timecards are first saved using p_mode = 'SAVE' (hxc_timestore_deposit.execute_deposit_process) and when the user is ready he submits his timecard using p_mode = 'SUBMIT'.
When I call hxc_timestore_deposit.execute_deposit_process with p_mode = 'SUBMIT' the PL/SQL table returned contains a 4. What does this mean??
When I requery the timecard it's submitted (hxc_time_building_blocks.approval_status) and everything seems ok, but why do the API return the number 4?

My code:

	<font face="courier new" size="2">DECLARE			
			<br/>  v_tbl_timecard_info         hxc_self_service_time_deposit.timecard_info;      		
			<br/>  v_tbl_attributes_info       hxc_self_service_time_deposit.app_attributes_info;
			<br/>  v_tbv_messages              hxc_self_service_time_deposit.message_table;
			<br/>  v_new_timecard_id           NUMBER; 			
			<br/>  v_new_timecard_ovn          NUMBER;			
			<br/>  i