I resolved after upgrading mysql server thanks for your suggestions Marco ----- Original Message ----- From: "Jesse Vincent" <jesse at bestpractical.com> To: "Marco Avvisano" <marco.avvisano at regione.toscana.it> Cc: <rt-users at lists.bestpractical.com> Sent: Friday, October 05, 2007 9:51 PM Subject: Re: [rt-users] errors on 3.6.5