I have found an anomoly with DBI on quad core Xeon processors HP boxes, we needed to recompile DBI on those boxes. Same code was in use on dual core CPU servers. This was redhat same release Can you connect without NLS Parameters? I would compile both DBI and DBD on that server for the 10g client Cheers Peter ________________________________ From: Stefan Knecht [mailto:knecht.stefan@xxxxxxxxx] Sent: Sunday, 21 October 2007 08:13 PM To: Mark.Bobak@xxxxxxxxxxxxxxx Cc: oracle-l Subject: Re: Help with 10.2.0.3 instant client and Perl 5.8.5 And one more idea -- in 10.2.0.3 the default permissions have changed of various places in ORACLE_HOME. And according to oracle@central:~/ [CENTRAL] oerr ora 12705 12705, 00000, "Cannot access NLS data files or invalid environment specified" // *Cause: Either an attempt was made to issue an ALTER SESSION command // with an invalid NLS parameter or value; or the environment // variable(s) NLS_LANG, ORA_NLSxx, or ORACLE_HOME was incorrectly // specified, therefore the NLS data files cannot be located. it may not be able to read the nls files. Try running strace -o strace.log <your perl script that fails> Then grep the output file for "open" and check for permission errors. Stefan On 10/16/07, Bobak, Mark <Mark.Bobak@xxxxxxxxxxxxxxx> wrote: Hi, Trying to port some stuff to 10.2 instant client, and getting an ORA-12705 in OCISessionBegin with NLS_LANG set to AMERICAN_AMERICA.WE8ISO8859P1, which appears to be a perfectly valid value. SQL*Plus from the same instant client home works fine. Using the 9i client works fine. Anyone have any ideas? Thanks, -Mark PS This is RedHat Linux, Enterprise Server 4 Update 3. -- Mark J. Bobak Senior Database Administrator, System & Product Technologies ProQuest 789 E. Eisenhower, Parkway, P.O. Box 1346 Ann Arbor MI 48106-1346 +1.734.997.4059 or +1.800.521.0600 x 4059 mark.bobak@xxxxxxxxxxxxxxx <mailto:mark.bobak@xxxxxxxxxxxxxxx> www.proquest.com <http://www.proquest.com> www.csa.com <http://www.csa.com> ProQuest...Start here. -- ========================= Stefan P Knecht Consultant Infrastructure Managed Services Trivadis AG Europa-Strasse 5 CH-8152 Glattbrugg Phone +41-44-808 70 20 Fax +41-808 70 12 Mobile +41-79-571 36 27 stefan.knecht@xxxxxxxxxxxx http://www.trivadis.com OCP SCSA SCNA =========================