I want to make an array and pass it to a method in the RHS but can't when I use mvel. If I use mvel then java new Object[3] causes compile errors. If I use the mvel syntax the object is not an real array, only a string in mvel's special array notation which is not useful for the functions I am trying to call. Working example: rule "Array bug" dialect "java" // explicit java or mvel barfs on new Object[]; when Message( ) then Object[] logArgs = new Object[3]; logArgs[0] = "Sample string"; logArgs[1] = "Another string"; logArgs[2] = "And done"; System.out.println( "Array was "+$m ); end If you change dialect above to mvel the code no longer compiles. If you change it to mvel and use the mvel list syntax ["Sample string", "Another string", "And done"] you don't have an array so methods requiring an array do not work. Concrete example: I want to log 3 values using a logging framework. Many logging frameworks (like sl4j) support a notation like Logger.warn("My name is {} and you killed my {}", array); where array has "Inigo Montonya" and "father" for values. Thanks for any advice! Zack -- View this message in context: http://drools.46999.n3.nabble.com/How-to-use-lists-in-RHS-when-using-MVEL... Sent from the Drools: User forum mailing list archive at Nabble.com.