Christian, thank you. That was the document I was thinking of! Now I have to go in and figure out if this was a one-off episode or a repeatable issue that I lavish gobs of valuable time on.! Thanks to all for the pointers! Regards, Gus On Mon, Jul 26, 2010 at 2:08 AM, Christian Antognini < Christian.Antognini@xxxxxxxxxxxx> wrote: > Hi Gus > > > Is there some other documentation that I should be looking in? > > Wasn't there once upopn a time a Working Aid that decrypted all > > the kg*, kc*, kl* modules with at least a good guess about > > their function and usage. > > Have a look to the following MOS note: > > ORA-600 Lookup Error Categories [ID 175982.1] > > > HTH > Chris Antognini > > Troubleshooting Oracle Performance, Apress 2008 > http://top.antognini.ch > > >