I've recently encountered and issue with some of my custom parser bots. The default parsers log a line like this:

Sent 7176 events and found 0 error(s)

This is quite fine piece of information but I am not getting that for my custom parsers. The only info i have is the number of processed messages. Is there a need to do something special apart from 'acknowledge_message()' and 'send_message()'?