No correct reprocess of the database

Hello,

When I logued on 4.00 on this morning, the data from the previous month had disappeared. I check in the Mysql DB to see if the visit was intact, it was. So I deleted all the archive to force rebuilding, but mysteriously the archive and stats are not rebuilding. Dœs anybody has an idea why ?

Ok, so i enabled/disabled the archive reprocessing trigger when opening piwik and deleted the archive table, nothing happened. But on a clean install without any plugin it seemed to work. Don’t know why exactly.