Hi Al. This is not a bug, your script is wrong. If TM is a,b,c,d,e,f then you have to do put item 1 of pArgs into tMatrix[0,0] put item 2 of pArgs into tMatrix[1,0] put item 3 of pArgs into tMatrix[0,1] put item 4 of pArgs into tMatrix[1,1] this yields correct results. [In fact your 'workaround' corrects the wrong script part] Hermann