Does it get turned off when you restart the server or just at a time during the day?
(Just a thougth but did you "alter database archivlogmode;" but forget to change the INI file?)

Did you see anything in the Alertlog(s)?


>For some reason, our Oracle databases keep deciding to turn off automatic archiving, then demand a new archive file is needed and lock up. This is getting very frustrating. They all start with archiving turned on, but seem to loose it.
>
>Any sugestions will be welcome.