I think david erle shontz wrote:
> Thanks to several folks I've successfully compiled JConsult. It's a very
> interesting package, made to accept any script modified to fit its input
> style. But I haven't been able to get it to execute on my own system
> yet. When I enter the command to execute the example script:
>
> java expert.Consultation file:/C:/Jess60a5/ RuleBase/zoo.clp
>
> I get the error message "Cannot open selected rulebase!". I've dug
> through the source code and found the class containing the error message,
> but haven't been able to discern what's causing the problem. I have
> installed Jess60a5 and JConsult at the C: level as above--everything seems
> to be in
> place.
I tried this out, and I got the same exception as you. Java
programmers, listen up: don't code like this! Here's the error message
in the JConsult source:
try {
ruleBase = new InputStreamReader (_ruleBaseURL.openStream());
} catch (Throwable exception) {
throw new RuleBaseXcp ("Cannot open the selected rule base!");
}
Note that the Java code -knows- why it can't open the rule base, but
it doesn't tell you! For debugging, I added a
"System.out.println(exception)" right before the throw, and, on my
system, I see this:
% java expert.Consultation file:/home/ejfried/JConsult RuleBase/zoo.clp
java.io.FileNotFoundException: /home/ejfried/RuleBase/zoo.clp (No
such file or directory)
%
So it turns out that JConsult is looking for the RuleBase subdirectory
as a sibling of the first argument, not as a subdirectory of it and
-not- relative to the current directory. This means the documentation
is wrong; maybe JVMs behave differently now in some respect compared
to when JConsult was last updated, or maybe this is an
applet/command-line difference. In any case, if I change the arguments to
read like this:
% java expert.Consultation file:/home/ejfried/JConsult/expert RuleBase/zoo.\clp
then it works perfectly for me.
Regarding what you say below: JConsult looks as if it will fit the
bill nicely.
>
> Our objective was to find a simple deffunction that would display a prompt
> and some radio buttons, allowing the user to select one. The selected
> text would be sent back to the function for binding to a variable. There
> are a couple of interesting examples on the JESS related sites page
> (including JConsult), but they tend to go deeper than we need (or, given
> our limited experience with the Java 1.1 AWT model, could follow). If
> anyone has a simple radio button layout they'd be willing to share, we'd
> sure appreciate it.
>
> Thank you,
>
> David Shontz
>
>
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---------------------------------------------------------
Ernest Friedman-Hill
Distributed Systems Research Phone: (925) 294-2154
Sandia National Labs FAX: (925) 294-2234
Org. 8920, MS 9012 [EMAIL PROTECTED]
PO Box 969 http://herzberg.ca.sandia.gov
Livermore, CA 94550
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