Hi All, Is there some way to make a reference to an encoder or pattern defined previously via a reference or similar? I've tried with the bellow configuration but it does not work :-( <configuration> <encoder name="ENC-1"class="ch.qos.logback.classic.encoder.PatternLayoutEncoder"> <Pattern>%date %.-1level [%mdc{SessionID}] [%t] %logger{32} - %m%n%ex{0}</Pattern> </encoder> <encoder name="ENC-2"class="ch.qos.logback.classic.encoder.PatternLayoutEncoder"> <Pattern>%date %.-1level [%mdc{SessionID}] [%t] %logger{32} - %m%n</Pattern> </encoder> <appender name="STDOUT-1" class="ch.qos.logback.core.ConsoleAppender"> <encoder-ref ref="ENC-1"/> </appender> <appender name="STDOUT-2" class="ch.qos.logback.core.ConsoleAppender"> <encoder-ref ref="ENC-2"/> </appender> <logger name="X.Y"> <level value="INFO" /> <appender-ref ref="STDOUT-2" /> </logger> <root level="DEBUG"> <appender-ref ref="STDOUT-1" /> </root> </configuration> BR, /César.