I've tested the configuration you posted on 09/Jul/12 10:42 AM with the FileNamePattern [${catalina.base}/logs/archive/%d{yyyy, aux}/%d{MM-dd, aux}/routing2.tomcat.%d{yyyy-MM-dd}.log.zip]. It works just fine. From the status output included in your post, it looks like the 'aux' parameter in %d{yyyy, aux} was not recognized. Could it be that you were using an older version of logback and upgraded 5 minutes later?

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