I think that Jing Mei wrote:
>>Does it mean that it is not permitted to write the results of a rule to
the file
>>router? Or just I have done some stupid mistakes?
Hi Jing Mei,
If you look at your code, you are opening and closing the router before the
rule engine is run!
;; Here you are resetting the working memory
(reset)
;; Now, you are opening the file
(open "out.txt" mo "w")
;; Then you define a rule
(defrule fail
(test (< 2 3))
=>
(printout mo "fail" crlf)
)
;;Now, you're closing the router!
(close mo)
;; By the time you run Jess, there
;; is nowhere to send the output! :-D
(run)
Try this code instead...
;;========= printfile.clp ===========
(clear)
(watch all)
;; Open a writer to the file
;; UNIX, use your "out.txt" for the file
(open "C:/out.txt" file "w")
;; A rule that fires and prints to a file
(defrule test-rule
(test (< 2 3))
=>
(printout file "This rule did fire!" crlf))
;; Reset working memory
(reset)
;; Run Jess
(run)
;; Close the file when all rules have fired
(close file)
;;=====================================
This code writes the file as expected.
Cheers,
Jason
----------------------------------------------
Jason Morris - Assistant Moderator
Jess Listserver - [EMAIL PROTECTED]
email: [EMAIL PROTECTED]
www.morristechnicalsolutions.com
fax/phone: 503.692.1088
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