I think this is rather a SPSS than a Limesurvey problem, because it comes up quite frequently on Google:
www.google.com.br/search?q=%23100+This+c...+definition+commands
www.talkstats.com/showthread.php/22101-P...n-t-see-what-s-wrong
www.google.com.br/search?q=%23100+This+c...+definition+commands
www.talkstats.com/showthread.php/22101-P...n-t-see-what-s-wrong