Hi, When I turn off index-right in my Drools program, some rules that are normally fired are no longer fired; turning off index-left seems to be fine. Obviously turning off both causes the error as well. I'm using Drools 3.0. Does this mean that my rules rely on some aspect of right-indexing, and are not strictly correct? Thanks! -- View this message in context: http://www.nabble.com/Disabling-indexing-causes-error-tf3668001.html#a102... Sent from the drools - user mailing list archive at Nabble.com.