Hi, Snippet of my DRL . rule "Rev: Start Time < 2 Hours in Future" when $obj : eval(compareDatesWithTime(startDateTime, -2, 2, "<")) then $obj.addFailedRule("Rev: Start Time < 2 Hours in Future"); end This fails during compilation and throws error: org.drools.rule.InvalidRulePackage: Unable to Analyse Expression (eval(compareDatesWithTime(startDateTime, -2, 2, "<")) ): [Error: unable to resolve method using strict-mode: myObject.eval(boolean)] [Near : {... (eval(compareDatesWithTime(star ....}] ^ [Line: 6, Column: 2] : [Rule name='Proposal - Start time is after current + 2 hour'] I am using Drools 5.5 and I found the cause that my code runs in strict mode.. so If I set strict mode to false then this would work. Now I am not sure how to make it to false. Here's the code I am using: PackageBuilderConfiguration packageBuilderConfiguration = new PackageBuilderConfiguration(); PackageBuilder packageBuilder = new PackageBuilder(packageBuilderConfiguration); packageBuilder.addPackageFromDrl(drl.getCharacterStream()); Can someone please suggest me how to do that?? Thanks!!! -- View this message in context: http://drools.46999.n3.nabble.com/How-to-set-drools-dialect-mvel-strict-f... Sent from the Drools: User forum mailing list archive at Nabble.com.