Hi all Sorry I know it's an already asked question, but I can't figure out how to configure logback to solve the problem. Here is my config: tomcat 7 under windows server 2012 logback 1.1.7 slf4j 1.7.21 java 7 logback.xml: <?xml version="1.0" encoding="UTF-8"?> <configuration scan="true" scanPeriod="10 seconds" debug="true"> <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender"> <file>logs\logback.log</file> <rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy"> <fileNamePattern>logs\logback.%i.log</fileNamePattern> <minIndex>1</minIndex> <maxIndex>20</maxIndex> </rollingPolicy> <triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy"> <maxFileSize>10MB</maxFileSize> </triggeringPolicy> <encoder> <charset>UTF-8</charset> <pattern>%date [%thread] %-5level %logger - %msg%n</pattern> </encoder> </appender> <logger name="it.infoline" level="WARN" /> <logger name="org.flywaydb" level="OFF" /> <logger name="it.infoline.ouverture.data.LogonDatabase" level="DEBUG" /> <root level="WARN"> <appender-ref ref="FILE" /> </root> </configuration> Enabling logback debug I've seen that the root cause is the renaming: 16:05:55,728 |-INFO in c.q.l.co.rolling.helper.RenameUtil - Renaming file [logs\logback.log] to [logs\logback.1.log] 16:05:55,728 |-WARN in c.q.l.co.rolling.helper.RenameUtil - Failed to rename file [logs\logback.log] as [logs\logback.1.log]. 16:05:55,729 |-WARN in c.q.l.co.rolling.helper.RenameUtil - Please consider leaving the [file] option of RollingFileAppender empty. 16:05:55,729 |-WARN in c.q.l.co.rolling.helper.RenameUtil - See also http://logback.qos.ch/codes.html#renamingError The solution in the link (http://logback.qos.ch/codes.html#renamingError) doesn't work with FixedWindowRollingPolicy if I understand well, right ? So I tried something like this: <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender"> <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> <fileNamePattern>C:\Infoline\WebAppConfig\log.%d{yyyy-MM-dd}.log</fileNamePattern> <maxHistory>30</maxHistory> <totalSizeCap>3GB</totalSizeCap> </rollingPolicy> <triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy"> <maxFileSize>1KB</maxFileSize> </triggeringPolicy> <encoder> <charset>UTF-8</charset> <pattern>${HOSTNAME} %date [%thread] %-5level %logger >%X{ILSID}< - %msg%n</pattern> </encoder> </appender> With this configuration I didn't understand where the log will go. Without file option, how can I tell logback which file to use? Sorry for the trivial question but it seems I can't find a solution myself thanks in advance Nicola -- Sent from: http://logback.10977.n7.nabble.com/Users-f3.html