[rules-users] rule not valid...

Folks, I am using Rules 4.0 in WebSphere 6.0 app server. Made a simple test file with a simple rule : rule "Test" when cs : SupplierView() then System.out.println(cs); end But getting exception: [6/6/07 16:13:06:456 EDT] 00000020 SystemErr R java.lang.IllegalArgumentException: The rule called Test is not valid. Check for compile errors reported. at org.drools.common.AbstractRuleBase.addRule(AbstractRuleBase.java:363) at org.drools.reteoo.ReteooRuleBase.addRule(ReteooRuleBase.java:263) at org.drools.common.AbstractRuleBase.addPackage(AbstractRuleBase.java:293) How can I check compile errors?? And what is not valid in this rule? Thanks for any ideas... -Sergey ********************** ** LEGAL DISCLAIMER ** ********************** This E-mail message and any attachments may contain legally privileged, confidential or proprietary information. If you are not the intended recipient(s), or the employee or agent responsible for delivery of this message to the intended recipient(s), you are hereby notified that any dissemination, distribution or copying of this E-mail message is strictly prohibited. If you have received this message in error, please immediately notify the sender and delete this E-mail message from your computer.