Don't put that in a eval, but directly in the second pattern constraints, like this :
rule "ValidMechanism"
	when
		$c : Capacity(doMin>20)
		$m : Mechanism(doMin <= $c.doMin, 
 DMOMax<=30, doMax>50 && doMin<40 && maxPower>180 &&
minPower>=100 && bidPower>100 && <200)
	then
		System.out.println("Capacity n°"+$c.getIdCapacity()+" eligible to the
mechanism n°"+$m.getIdMechanism()+" for rule 1" );
end


Le 13/07/2011 14:34, FrankVhh a écrit : 
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.



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