(defrule load_breakfast
(more ?m)
?f1 <- (total ?t)
=>
(bind ?t (+ ?t ?m))
(retract ?f1)
(assert (total ?t))
(halt)
)
I hope it help.. :-)
Regards
Andy Vu
Christo Andonyadis wrote:
> I always have trouble getting retract or modify to work.
> If (assert (total 0)) gets asserted somewhere, and I want to add to in
> another rule:
>
> (defrule load_breakfast
> (more ?m)
> ?t <- (total ?t)
> =>
> (modify ?t (+ ?t ?m))
> )
> or
> (retract ?t)
> (assert (total (+ ?t ?m))
>
> I get messages like:
> ATTENTION: Rete Exception in routine Fact::FindSlot while executing
> defrule load_breakfast.
> Message: Attempt to find named slot in ordered fact at line 0: ( run
> ) .
>
> Anyone know the answer?
>
> Thanks
> Christo
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