I get this error. 15:44:33,114 |-ERROR in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Could not create component [filter] of type [ch.qos.logback.core.filter.JaninoEvaluatorFilter] java.lang.ClassNotFoundException: ch.qos.logback.core.filter.JaninoEvaluatorFilter at java.lang.ClassNotFoundException: ch.qos.logback.core.filter.JaninoEvaluatorFilter From: logback-user-bounces@qos.ch [mailto:logback-user-bounces@qos.ch] On Behalf Of Tony Trinh Sent: Friday, June 22, 2012 3:21 PM To: logback users list Subject: Re: [logback-user] Problems with jaino evaluator On Fri, Jun 22, 2012 at 4:10 PM, Tony Trinh <tony19@gmail.com<mailto:tony19@gmail.com>> wrote: <expression>return (mdc.get("SEND_ALARM") != null) && (level > INFO);</expression> The ampersands need to be escaped: <expression>return (mdc.get("SEND_ALARM") != null) && (level > INFO);</expression> ________________________________ This e-mail may contain Sprint Nextel proprietary information intended for the sole use of the recipient(s). Any use by others is prohibited. If you are not the intended recipient, please contact the sender and delete all copies of the message.