If we had the whole stack trace (including the getCause() exception,
if there is one) it would tell us where you are in Jess when you get
the exception. As it is, we can't tell where things might be going
wrong.
On Feb 19, 2009, at 10:31 AM, Theunissen, Teun wrote:
I am creating a fact in a java method. When I add this fact to the
rete engine I get the following error:
An error occurred at line: -1
which look like: null
Errormessage: No slot __data in deftemplate MAIN::answer
The problem is that the answer fact is an unordered fact and the
deftemplate is defined in the MAIN module.
It seems that the rete engine handles this fact as an ordered fact.
What can I do to solve this problem?
The java code that builds the fact:
public void assertAnswer(String identifier, String answer, int
valuetype) {
try {
Fact afct = new Fact("answer", m_rete);
afct.setSlotValue("ident", new Value(identifier,RU.SYMBOL));
afct.setSlotValue("text", new Value(answer,valuetype));
System.out.println(afct.toString());
m_rete.assertFact(afct);
The messages on the console:
Focus: MAIN
(MAIN::answer (ident IL1_1) (text NEE))
JessEvent: [JessEvent: a fact was asserted]
An error occurred at line: -1
which look like: null
Errormessage: No slot __data in deftemplate MAIN::answer
Kind regards
Teun Theunissen
---------------------------------------------------------
Ernest Friedman-Hill
Informatics & Decision Sciences Phone: (925) 294-2154
Sandia National Labs
PO Box 969, MS 9012 [email protected]
Livermore, CA 94550 http://www.jessrules.com
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