Hi David, thanks for your reply, I will enable the listener as per your suggestion as it will be useful to see, though I believe I may now better understand the root cause of the problem - a 'long standing windows bug' with memory mapped files according to a reply I received from Jetty-Users: http://dev.eclipse.org/mhonarc/lists/jetty-users/msg03222.html and http://dev.eclipse.org/mhonarc/lists/jetty-users/msg03223.html (haven't had a reply to my last query) Thanks for your help, Karen PS, my logback version is 1.0.0 On 16/04/13 15:37, diroussel wrote:

Karen,

Your post didn't make it onto the mailing list, as you are not subscribed. It only made it into nabble.

Try setting this system property:

-Dlogback.statusListenerClass=ch.qos.logback.core.status.OnConsoleStatusListener

Then logback should print out any problems it had rolling the files. Windows won't let a file be renamed if it is open. Perhaps something has the file open?

What version of logback are you using?

David

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-- *Karen Murphy* Systems Analyst - Bibliographic Services The Library at Queen's Queen's University Belfast Belfast BT7 1LP Tel: 028 90976260 Email: k.l.murphy@qub.ac.uk