   That syntax was deprecated. Use "or" and "and" between patterns, and use "&&" and "||" inside patterns between constraints. Also, the single binding for "or" uses () if I am not mistaken:

core : ( BWCore(systemId == "1" ) or
     BWCore(systemId == "2" ) or
     BWCore(systemId == "3") )

   Finally, although that was the way to do it in Drools 3, it is terribly inefficient compared to the Drools 4/5 constraint connectives. The same condition above should be re-written in one of the following, much more efficient, ways:

core : BWCore( systemId in ("1", "2", "3" ) )
core : BWCore( systemId == "1" || == "2" || == "3" )
core : BWCore( systemId == "1" || systemId == "2" || systemId == "3" )

   []s
   Edson

2010/3/24 Nars <narayanan.anantharaman@citi.com>

To add more to the above, the error comes only when we bind the matched
object and use it in consequence. If we do not use the matched object in
consequence, it works fine.
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Edson Tirelli
JBoss Drools Core Development
JBoss by Red Hat @ www.jboss.com