 There was a strike of taxi and I had to take a metro to take train from Barcelona Sants that too in the rain They told me me the way by metro which was ok however the Barcelona North train station is at the same distance as the metro Both metro and the train station are at the same place The train goes straight and the metro needs a change to get to the train station The staff should have done the research to tell people the best way to go I had already bought the metro ticket that does not work for entry into the train station We did reach the train station It was tricky with my limited Spanish but I did manage 
No Positive