Hello all I am using Drools 4.0.3 I am using a .xml rule file in my application in which I am validating the user entered data through my rule file. When I am not using <pattern /> tag in my rule file then it is working fine but when I use it ,the rules are not firing even it is not showing any exception also. For your reference I am coping my rule file below : <?xml version="1.0" encoding="UTF-8" ?> <package xmlns="http://drools.org/drools-4.0" xmlns:xs="http://www.w3.org/2001/XMLSchema-instance" name="jbossrules" xs:schemaLocation="http://drools.org/drools-4.0 drools-4.0.xsd"> <import name="com.wipro.evalidator.response.bean.ResponseBean" /> <global identifier="response" type="com.wipro.evalidator.response.bean.ResponseBean" /> <import name="java.lang.*" /> <import name="com.wipro.airline.SearchBean" /> <rule name="rule1"> <rule-attribute name="agenda-group" value="AirlineApp" /> <rule-attribute name="activation-group" value="activation_1195126928297" /> <lhs> <pattern identifier="searchbean" object-type="com.wipro.airline.SearchBean" /> <eval>true</eval> </lhs> <rhs> System.out.println("date is not valid.");response.setStatus("failure");response.setSubStatus("date_notva lid"); </rhs> </rule> </package> If <pattern /> tag is not allowed here then how can we use SearchBean fields in the lhs part of the rule. Any help will be appreciated. Regards Prateek Katiyar The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments. WARNING: Computer viruses can be transmitted via email. The recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email. www.wipro.com