HI, Ok .. I did some tweaking and was able to get 1 simple rule to compile: I think I just need to go over the drl and do some manipulations like: 1. Changed .drl ifles to .dslr 2. Did some rule syntax changes like: [when]Coverage information exists=coverageTO : CoverageTO() à [condition][]Coverage exist= coverageTO : CoverageTO() How do I write something like this in drools 5: [when]myCondition=eval((coverageTO.getAmount()==null || coverageTO.getDeductible().length() <=0) && coverageTO.getOther().length()<=0) Thanks for all the help; saleem From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Mauricio Salatino Sent: Friday, February 11, 2011 3:52 PM To: Rules Users List Subject: Re: [rules-users] Upgrading from Drools 2 to 5 What kind of errors are you getting? Can you share with us that information? 2011/2/11 Saleem Lakhani <Saleem.Lakhani(a)citizensfla.com&gt; Hi, I need some help regarding upgrading our validation engine from 2.0 to 5.0, I have added the required jars and my java code is compiling but the DRL and DSL are not. Any suggestions? Thanks, saleem _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- - CTO @ http://www.plugtree.com - MyJourney @ http://salaboy.wordpress.com - Co-Founder @ http://www.jbug.com.ar - Salatino "Salaboy" Mauricio -