I think [EMAIL PROTECTED] wrote:

> 
> and then i want to run everything.    but i keep getting Nullpointer expection. 
> and i think becouse i am trying to r.executeCommand to Jess b4 running 
> 

Jess won't throw bare NullPointerExceptions; it may throw them wrapped
in JessException if you try, for example, to call a method on a nil
reference from within the Jess language. If you're getting bare
NullPointerExceptions, then it's more likely that "r" isn't being
initialized before you're calling methods on it.

Make sure you read and follow the advice in the section of chapter 4
of the manual that concerns JessException (regarding displaying all
the information in a JessException object.) It will be a big help in
tracking down problems like this.

> r.executeCommand("(batch jess/scriptlib.clp)");

It's not necessary to do this in Jess 6; Jess takes care of loading
this library itself.


---------------------------------------------------------
Ernest Friedman-Hill  
Science and Engineering PSEs        Phone: (925) 294-2154
Sandia National Labs                FAX:   (925) 294-2234
PO Box 969, MS 9012                 [EMAIL PROTECTED]
Livermore, CA 94550         http://herzberg.ca.sandia.gov

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