I'm trying to use the parameterized logging feature in LogBack 0.2.5, but I can't get it to work. I'm using a basic configuration: <configuration> <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender"> <layout class="ch.qos.logback.classic.PatternLayout"> <param name="pattern" value="%-4relative [%thread] %-5level %class - %msg%n" /> </layout> </appender> <root> <level value="debug" /> <appender-ref ref="STDOUT" /> </root> </configuration> When logging debug("Hello {}", obj), I get the logging output "Hello {}". Is there anything special you have do do in order to get this working? Any special appenders or layouts? Any special objects as parameters to the logging function? Cheers, Rickard