Hi, It depends upon which version of drools you are using, but if it is a version pre 5.2.0, than your last line should be: eval($c.getDoMin()>=$m.getDoMin()) If you are using 5.2.0, the parser allow a bit more freedom, allthough I am not sure about this very case. You surely will have to omit the ; at the end of your condition. Regards, Frank michou89 wrote: > rule "ValidMechanism" > when > $c : Capacity(doMin>20) > $m : Mechanism(DMOMax<=30, doMax>50&& doMin<40&& maxPower>180&& > minPower>=100&& bidPower>100&& <200) > $c.getDoMin()>=$m.getDoMin(); > then > System.out.println("Capacity n°"+$c.getIdCapacity()+" eligible to the > mechanism n°"+$m.getIdMechanism()+" for rule 1" ); > end > > > My error : org.drools.rule.InvalidRulePackage: [40,15]: unknown:40:15 > mismatched token: [@100,813:814='>=',<78>,40:15]; expecting type THEN > (this is the last line before the "then") > > > I don't understand why I can't compare 2 values. > -- View this message in context: http://drools.46999.n3.nabble.com/Rule-error-tp3162619p3165771.html Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users