Hi, We are upgrading from Drools 5.1 to 5.3 to improve the performance, but we are hoping to keep our drl files intact. We were trying to use the old drl files by setting "drools.dialect.mvel.strict=false", but somehow with this setting we still got " unable to resolve method using strict-mode .." error from time to time. I'm wondering if there is any correlation between this strict-mode and the performance gain, if in order to achieve the performance gain, we have to set the strict-mode to true, then we will make changes to our drl files, instead of spending time to figure out why the effect of "drools.dialect.mvel.strict=false" is sporadic. Thanks. -- View this message in context: http://drools.46999.n3.nabble.com/MVEL-strict-mode-vs-performance-tp37418... 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