Does anyone know of a compatibility matrix that shows what JDK versions are compatible with Drools 5.5? The documentation mentions at least Java 1.5 is needed, and says some examples may need 1.6. I have encountered a problem when classes are compiled with Java 1.7, in that if they are referenced by a DRL file, the rules compiler gives the error "[Class] cannot be resolved to a type" for the classes that were compiled (actually the whole jar) with Java 1.7. Here is my post when I was trying to resolve that compile issue: Previous post on [Class] cannot be resolved to a type error <http://drools.46999.n3.nabble.com/Converting-Drools-3-x-to-5-5-A-JBoss-Ru... The rule compiler error went away when I recompiled the classes and deployed the jar using Java 1.6. Anyone else have an issue with 1.7, or know if Drools 5.5 is supposed to be compatible? Thanks, rb -- View this message in context: http://drools.46999.n3.nabble.com/Drools-5-5-and-Java-1-6-versus-1-7-Ques... Sent from the Drools: User forum mailing list archive at Nabble.com.