Hi. I didn't see this in Jira, and it is very reproducible for me. I am using 5.0CR1, and trying to work completely in Guvnor. I create a simple Model, add a Business Rule and a Test Scenario, and all works fine. As soon as I add a function, the Test Scenarios no longer work. If I delete the function, the Test Scenario starts working again. Here is a simple sample. package TestPkg declare TestFact name: String age: Integer end function int testFunc() { return 2; } rule "TestRule" dialect "mvel" when $testFact : TestFact( name == "Bill" ) then $testFact.setAge( 3 ); end I'm not even calling the function - just its presence causes Test Scenarios to fail. Thanks, Herman Post -- View this message in context: http://www.nabble.com/Bug-in-Guvnor--tp22919335p22919335.html Sent from the drools - user mailing list archive at Nabble.com.