[rules-users] Basic Question about Errors

Hi, it's a basic question but since half a year i am not sure how to read the error [53,61]: unknown:53:61 Unexpected token '('[53,73]: unknown:53:73 mismatched token: [@771,2278:2278=')',<12>,53:73]; expecting type THEN[65,61]: which line/position is indicated in the corresponding rule file. Every time, when i think now i got it the next error shows me i'm not right. Cheers Markus