There is patches for ORA-07445 errors on most platforms, have a look at metalink to identify your required patch Cheers Peter On Mon, 2007-11-12 at 10:30 -0500, Khan, Muhammad S wrote: > Hi DBAs. > > > > > > The instance with Oracle 10g DB on Windows 2003 SP1 box suddenly > crashed last night with the following error in the alert log file. > > > > ORA-07445: exception encountered: core dump [ACCESS_VIOLATION] > [__chkstk+23] [PC:0x1D56927] [ADDR:0x5942AD28] [UNABLE_TO_READ] [] > > > > > > When looked into the related trace file, the error is mentioned there > as below: > > > > *** SERVICE NAME:(SYS$USERS) 2007-11-10 02:30:14.652 > > *** SESSION ID:(141.27363) 2007-11-10 02:30:14.652 > > *** 2007-11-10 02:30:14.652 > > ksedmp: internal or fatal error > > ORA-07445: exception encountered: core dump [ACCESS_VIOLATION] > [__chkstk+23] [PC:0x1D56927] [ADDR:0x5942AD28] [UNABLE_TO_READ] [] > > Current SQL statement for this session: > > update tsq$ set > blocks=:3,maxblocks=:4,grantor#=:5,priv1=:6,priv2=:7,priv3=:8 where > ts#=:1 and user#=:2 > > > > There was almost no user activity at that particular time. Has anyone > experienced a similar error before? > > > > Any expert opinion? > > > > > > Thanks, > > Khan > > > >