Pls help me debug this error...
Jess> (defrule recommendipodnano (object(is-a Customer)(customer-id ?id))
(not (and (object(is-a SalesOrder)(OrderNumber ?o)(customer-id ?id))
(object(is-a LineItem)(OrderNumber ?o)(partnumber ?pn))
(object(is-a Product)(partnumber ?pn)(name “ipod nano”)))) => (assert
(object(is-a Recommend)(OrderNumber ?o)(partnumber ?pn)))
)
TRUE
Jess> (run)
Jess reported an error in routine Context.getVariable
while executing (assert (MAIN::object (is-a Recommend) (is-a-name nil)
(OBJECT nil) (rdfs:label ) (owl:versionInfo ) (rdfs:comment ) (rdfs:member )
(:NAME ) (rdfs:isDefinedBy ) (rdfs:seeAlso ) (owl:differentFrom )
(owl:sameAs ) (rdf:value ) (protege:inferredType ) (rdf:type ) (name )
(category ) (partnumber ?pn) (price ) (requires ) (address ) (customer-id )
(OrderNumber ?o) (quantity )))
while executing defrule MAIN::recommendipodnano
while executing (run).
Message: No such variable pn.
Program text: ( run ) at line 39.
at jess.Context.getVariable(Unknown Source)
at jess.Variable.resolveValue(Unknown Source)
at jess.Fact.a(Unknown Source)
at jess.bj.call(Unknown Source)
at jess.ep.a(Unknown Source)
at jess.Funcall.execute(Unknown Source)
at jess.Defrule.a(Unknown Source)
at jess.Activation.if(Unknown Source)
at jess.a8.a(Unknown Source)
at jess.a8.int(Unknown Source)
at jess.Rete.run(Unknown Source)
at jess.a0.call(Unknown Source)
at jess.ep.a(Unknown Source)
at jess.Funcall.execute(Unknown Source)
at jess.Jesp.a(Unknown Source)
at jess.Jesp.for(Unknown Source)
at jess.Jesp.parse(Unknown Source)
at jess.Jesp.parse(Unknown Source)
at jess.Main.execute(Unknown Source)
at JessTab.JessTabEngine.run(JessTabEngine.java:114)
at java.lang.Thread.run(Unknown Source)
.......Pls reply at earliest....thanks
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