HI I see this error in my eclipse , could any one let me know what I am missing ? I am using mac and my ivy.xml has these dependencies: <dependency org="ch.qos.logback" name="logback-core" rev="1.0.11" conf="runtime,test"> <exclude org="org.codehaus.janino" module="janino"/> </dependency> <dependency org="ch.qos.logback" name="logback-classic" rev="1.0.11" conf="runtime,test"/> <!-- Conditional processing in logback configuration files requires the Janino library. --> <dependency org="org.codehaus.janino" name="janino" rev="2.6.1" conf="runtime,test"/> <dependency org="org.codehaus.janino" name="janino" rev="2.6.1" conf="source->source"/> <!-- Having jcl-over-slf4j means we CANNOT have commons-logging in the classpath --> <dependency org="org.slf4j" name="jcl-over-slf4j" rev="1.7.2" conf="runtime,test"/> <!-- Having log4j-over-slf4j bridge means migrating to slf4j without making changes to projects like omapi --> <dependency org="org.slf4j" name="log4j-over-slf4j" rev="1.7.2" conf="runtime,test"/> Thanks Ramesh 11:16:21,797 |-INFO in ch.qos.logback.classic.joran.action.LoggerAction - Setting level of logger [com.homeaway] to INFO 11:16:21,797 |-INFO in ch.qos.logback.classic.joran.action.RootLoggerAction - Setting level of ROOT logger to INFO Failed to instantiate [ch.qos.logback.classic.LoggerContext] Reported exception: java.lang.NoSuchMethodError: org.codehaus.janino.ClassBodyEvaluator.setImplementedInterfaces([Ljava/lang/Class;)V at ch.qos.logback.core.joran.conditional.PropertyEvalScriptBuilder.build(PropertyEvalScriptBuilder.java:48) at ch.qos.logback.core.joran.conditional.IfAction.begin(IfAction.java:67) at ch.qos.logback.core.joran.spi.Interpreter.callBeginAction(Interpreter.java:276) at ch.qos.logback.core.joran.spi.Interpreter.startElement(Interpreter.java:148) at ch.qos.logback.core.joran.spi.Interpreter.startElement(Interpreter.java:130) at ch.qos.logback.core.joran.spi.EventPlayer.play(EventPlayer.java:50) at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:157) at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:143) at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:106) at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:56) at ch.qos.logback.classic.util.ContextInitializer.configureByResource(ContextInitializer.java:75) at ch.qos.logback.classic.util.ContextInitializer.autoConfig(ContextInitializer.java:148) at org.slf4j.impl.StaticLoggerBinder.init(StaticLoggerBinder.java:85) at org.slf4j.impl.StaticLoggerBinder.<clinit>(StaticLoggerBinder.java:55) at org.slf4j.LoggerFactory.bind(LoggerFactory.java:128) at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:107) at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:295) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:269)