Hi, After upgrading from Logback 1.1.3 to version 1.1.5 I've noticed that it isn't creating the log file any more. I'm using a RollingFileAppender configured using a piece of code like this: RollingFileAppender result = logFileName ? new RollingFileAppender() : null result.file = logFileName def rollingPolicy = new FixedWindowRollingPolicy( ) rollingPolicy.fileNamePattern = "${logFileName}.%i" rollingPolicy.setContext(loggerContext) rollingPolicy.setParent(result) rollingPolicy.setMinIndex(1) rollingPolicy.setMaxIndex(9) rollingPolicy.start() result.rollingPolicy = rollingPolicy result.encoder = createEncoder() result.setContext(loggerContext) result.setTriggeringPolicy(new RollOnStartupPolicy()) result.start() Something has changed that logic ? Cheers, Paolo