Hi John, i ran into similar situation with sqlplus in my hotbackup script. make sure that your sqlloder is not using wrong version of oracle libraries # ldd `which sqlldr` in my case i upgraded one of the oracle home from 9204 to 9206. and my sqlplus which was in another 9204 home broke.. becoz of ld_library_path issues -vasu On 6/15/05, John Dunn <jdunn@xxxxxxxxx> wrote: > I have just migrated an application from test to prod. On the prod machine I > get the following error from sqlldr > > SQL*Loader-128: unable to begin a session : ORA-12705: invalid or unknown > NLS parameter value specified -- //www.freelists.org/webpage/oracle-l