I think that Chirag wrote: >>?fact <- (MAIN::findwherecontains productType CVBND ?fc) in the rule always stops the rule from activating.
Hi Chirag, You might be violating the Zen of Jess http://herzberg.ca.sandia.gov/jess/zen.shtml. In your code ?fact <- (MAIN::findwherecontains productType CVBND ?fc) you are trying to use the explicit pattern binding mechanism, "<-", to bind the results of a function call to a variable, which as far as I know, won't work. Patterns binding are just that: a means to bind the actual fact reference of a fact that matches a particular pattern to a variable for use on the RHS of a rule. >>I do not understand why. Jess is looking for an ordered fact named (MAIN::findwherecontains) containing a list of three values in its single slot, and it's rightly not finding any, so the rule never activates. Also, if you look at your function (deffunction MAIN::findwherecontains (?detail ?value ?col) ... you have it returning either 0, a fact reference, or FALSE depending on where the control flows. Then, you're trying to bind that to a variable that's clearly intended to hold a fact reference later... a sure source of future bugs. See if that helps. Cheers! -Jason ------------------------ Jason Morris Morris Technical Solutions [EMAIL PROTECTED] www.morristechnicalsolutions.com fax/phone: 503.692.1088 -------------------------------------------------------------------- To unsubscribe, send the words 'unsubscribe jess-users [EMAIL PROTECTED]' in the BODY of a message to [EMAIL PROTECTED], NOT to the list (use your own address!) List problems? Notify [EMAIL PROTECTED] --------------------------------------------------------------------
