Dominic, can you set an event on the ora 68 to dump an errorstack level 3 dump? that should at least reveal from what (oracle database) kernel function the ora 68 is raised, and make underlying issues like an ora 600 visible (alter session set events '68 trace name errorstack level 3') Frits Hoogland http://fritshoogland.wordpress.com frits.hoogland@xxxxxxxxx Office : +31 20 5939953 Mobile: +31 6 14180860 On 02 Sep 2014, at 09:33, Dominic Brooks <dombrooks@xxxxxxxxxxx> wrote: > From trace files it looks like ORA-00068 is spurious and thrown by an > underlying ORA-00600. > >