Hi, We are experiencing JVM crash in 64 bits windows server. JVM core dump indicated that Eclipse compiler is the culprit. Current CompileTask: C2:3096 org.eclipse.jdt.internal.compiler.lookup.Scope.findMemberType([CLorg/eclipse/jdt/internal/compiler/lookup/ReferenceBinding;)Lorg/eclipse/jdt/internal/compiler/lookup/ReferenceBinding; (665 bytes) However, we already specified Drools to use Janino rather than Eclipse ( http://blog.athico.com/2006/12/dynamically-generated-class-beans-as.html). -Ddrools.compiler=JANINO Any idea? Thanks. Andy