I am trying to use mvel for RHS but Drools gives me BuildError : Unable to build expression for 'consequence' : null 'i = Util.test();' The error goes away when I remove the "dialect 'mvel'" line, so the error must have something to do with using mvel. I think I am missing something here, but the documentation on MVEL in Drools is really scanty. Code: import java.util.*; import a.b.Util; rule "Test" dialect "mvel" when eval(true) then Util.test(); end -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Using-mvel-in-RHS-wit... Sent from the Drools - User mailing list archive at Nabble.com.