Siri,
I want to add that the issue (scoreboard tlm fifo items are empty) was there even before adding the FCOV subscriber, I have recently added the subscriber just to narrow the debugging, more exactly to know if the problem is in the producer (monitor) or the consumer (scoreboard). since the FCOV is able to get all the transactions, it looks to me that the monitor is okay and something is wrong with the scoreboard.
Regards,
Adnane