[mkgmap-dev] What is wrong in my style rules

Hi, what is wrong with these rules? When I activate the second rule I get a corrupted gmapsupp.img. (The first one is working ok). # Maxspeed (test) highway=* & ref=* & maxspeed > 1 { add display_name = '${ref} (${maxspeed})' } # highway=* & name=* & maxspeed > 1 { add display_name = '${name} (${maxspeed})' } # Set highway names to include the reference if there is one ... Greetings Chris