Specman - error while connecting the monitor to scoreboard - verification

Question

I am using e (specman) in my project.
I build verification environment for uart.
I have a struct which is like any_sequence_item named uart_frame_s.
I want to add scoreboard for the tx in the uart.
I have the following instance in the uart_tx_agent:
uart_monitor: uart_tx_monitor_u is instance;
Definition of the scoreboard:
unit uart_tx_scoreboard_u like uvm_scoreboard{
scbd_port frame_add : add uart_frame_s;
scbd_port frame_match : match uart_frame_s;
};
I try to connect by:
connect_ports() is also {
uart_monitor.uart_frame_s_started.connect(tx_scb.uart_frame_s_add);
uart_monitor.uart_frame_s_ended.connect(tx_scb.uart_frame_s_match);
};
where:
uart_scb (scoreboard) is instance in uart_tx_agent
Definition of the TLM ports in the monitor:
uart_frame_s_started : out iterface_port of tlm_analysis of uart_frame_s is instance;
uart_frame_s_ended : out iterface_port of tlm_analysis of uart_frame_s is instance;
I get the following errors:
Error: 'uart_monitor' (of 'uart_tx_monitor_u') does not have 'uart_frame_S_started'field....
Error: 'uart_monitor' (of 'uart_tx_monitor_u') does not have 'uart_frame_S_ended'field

Answer 1

from the information that you have provided above, I can conclude the following:
1.the e scoreboard comes with predefined TLM implementation ports that you need to connect the monitor TLM output ports to.It seems like you did not define the TLM ports in your monitor. Pleas define those TLM ports as they are required when connecting to the scoreboard (there are examples for that in the scoreboard documentation).
What I suggest is that as soon as you finish collecting the frame from the bus , emit an event that notifies that a frame was completed (I guess you can call it "uart_frame_s_endded" ), then upon that event emit , send the collected frame to the scoreboard through the Monitor's TLM output ports for add/match. ( I guess 'add' would be appropriate for UART tx).
if the ports are defined, make sure to use the connect_portS() function in a place in the code that the parser will read later than the port definition.
just an FYI:
it seems like you defined the scoreboard from within the Agent. (seems like tx_scbd and uart_monitor are under the same hierarchy.
It is considered 'bad practice' to put a system level component (scoreboard) inside an uVC (which in this case is a UART interface component).
hopw this helps