Hi, This exception is not throwing very often. Occasionally i got this FactException . Is it because of another rule/Fact? i have the following rule also rule "check created error" dialect "mvel" salience 100000 no-loop true when $add:Address(continent=="asia") then retract( $add) can't a drl file contain both update and retract together? if both rules satisfy the facts what will happen for the handle? Thanks and Regs, Basha Sikkandar Nawabjan wrote: That should work, its a fairly trivial use case, so I'm very surprised it doesn't.... If you are suare this isn't working for you, can you open a jira with a minimal self contained test project showing the error.