Hi pteixeira
The results service is from
http://rss.betfair.comSometimes there is no service. I have just tested it and there are no results at the moment. Also checked the Betfair website and most games inplay do not have a current score. There must be a problem at Betfair at the moment.
In a trigger you should be able to test if results / score are available in a condition:
market_score1+market_score2 is less than 0
because if there is no market score (and possibly no results) market_scorex returns -1
Try again later is all I can suggest.