I think lilu wrote:
> Hello.
> How can I check that Java object is not null in Jess?
> Sencerely, Ilona Karpova

The Jess equivalent of Java null is the symbol nil. So you can check
if a variable ?x is not null with

(if (neq ?x nil) then ...

Ernest Friedman-Hill  
Advanced Software Research          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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