The line "System...3000)" isn't a constraint - it is a boolean expression. Whether it is correct or not depends on its surroundings. Syntax aside, note that using a method call that's not time-invariant is unlikely to produce correct results. -W On 22 July 2010 13:31, retoy <reto.lamprecht(a)allianz-suisse.ch&gt; wrote:

Reto, State nodes only support rule constraints. The reason is that a constraint in a wait state should be continuously evaluated (while the state is active), and the only way to do that efficiently is to use a rule for that (as that is basically what a rules engine is good at). I know the docs on the state node are outdated, will be updating this in the next few days, as this was updated as one of the new 5.1 features. For some simple examples, you can currently check out the junit tests though: http://anonsvn.jboss.org/repos/labs/labs/jbossrules/trunk/drools-compiler... Kris Quoting retoy <reto.lamprecht(a)allianz-suisse.ch&gt;: http://drools-java-rules-engine.46999.n3.nabble.com/Wait-state-constriant... Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm