OK, I did some checking and upgrading (now I have 6.0a6), but it still
doesn't work.
The difference is that I did not define the deftemplate in the Jess code
but rather have:
(defclass bla bla)
(defrule detect-bla-objects
?o <- (bla (ID1 ?id) (ID2 ?id2&~?id))
=>
...
)
and a Java file with the class 'bla', which is basically the same thing,
just the place where the deftemplate gets defined is different. The Java
bean appears to be OK, because the following works just fine:
(defrule detect-bla-objects
?o <- (bla (ID1 ?id) (ID2 ?id2))
(test (neq ?id2 ?id))
=>
...
)
Thanks,
tge
Emmanuel Lecharny wrote:
>
> Hi,
>
> that's strange, because it's working on a jess 6.0a5 version. Are you using
> this version? :
>
> C:\Jess>java -classpath . jess/Main
>
> Jess, the Java Expert System Shell
> Copyright (C) 1998 E.J. Friedman Hill and the Sandia Corporation
> Jess Version 6.0a5 3/12/2001
>
> Jess> (deftemplate AA (slot name) (slot n2))
> TRUE
> Jess> (defrule tt (AA (name ?name) (n2 ?n2&~?name)) => (printout t "diff"
> crlf))
> TRUE
> Jess> (assert (AA (name "aa") (n2 "bb")))
> <Fact-0>
> Jess> (run)
> diff
> 1
> Jess> (assert (AA (name "aa") (n2 "aa")))
> <Fact-1>
> Jess> (run)
> 0
> Jess>
>
> Emmanuel Lecharny, IKTEK
> 06 08 33 32 61, www.iktek.com <http://www.iktek.com>
>
> -----Message d'origine-----
> De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]De
> la part de Thomas Gentsch
> Envoye : samedi 26 mai 2001 14:58
> A : Jess
> Objet : JESS: Undefined variable referenced
>
> Hello there,
>
> discovered some behavior, which doesn't make sense to me:
>
> (defrule warn-if-low
> (tank (name ?name) (another_name ?n2&~?name) (low TRUE) (intact TRUE))
> ...
>
> If I do this Jess complains that I use ?name before defining it (the
> beans are OK) - seems to be like a parser bug (?)
> Does somebody know a fix/workaround besides changing the rule by adding
> a (test (neq ?n2 ?name))
>
> Thanks a lot,
> tge
>
> --
>
> Thomas Gentsch
>
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................................................
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--------------
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