Re: [rules-users] first steps with drools.....first errors

Hi, I am moving my first steps with Drools 4.0.7. In my case I have an exam result to valuate. I can pass an ExamDetailas fact containing (value, authLimit, lawLimit) where authLimit may or may not be present. How can I force to valuate a rule only if a property exists? Here an example: rule "Rule n.1" dialect "mvel" no-loop true salience 10 when exists ExamDetail(authLimit); $examDetail : ExamDetail( $value: value < authLimit); then System.out.println( "1 Exam passed!" + $value); end rule "Rule n.2" dialect "mvel" no-loop true salience 10 when not exists ExamDetail(authLimit); ExamDetail( $value: value < lawLimit); then System.out.println( "2 Exam passed! + $value); end With these 2 rules I expected to cover my 2 cases: 1) When I have authLimit --> rule #1 2) When authLimit is absent --> rule #2 But I get this error (when I don't have authlimit): Exception in thread "main" org.drools.rule.InvalidRulePackage: [14,21]: unknown:14:21 Unexpected token 'authLimit'[25,6]: unknown:25:6 Unexpected token 'exists'[25,24]: unknown:25:24 Unexpected token 'authLimit' at org.drools.rule.Package.checkValidity(Package.java:424) at org.drools.common.AbstractRuleBase.addPackage(AbstractRuleBase.java:394) at eu.tecnoprogetti.rules.seam.ExamCheck.main(ExamCheck.java:23) Any suggestions? Thank you for your time. Nico _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users