I know this works for the database on unix side. Any ideas to check on windows client machine? Sorry for not being clear on my first mail. --Sundar ________________________________ From: Harel Safra [mailto:harel.safra@xxxxxxxxx] Sent: August 18, 2010 11:03 AM To: Mahadevan, Sundar Cc: Oracle-L@xxxxxxxxxxxxx Subject: Re: How to check if my sqlplus client is 32 bit or 64 bit cd $ORACLE_HOME/bin file sqlplus On Wed, Aug 18, 2010 at 5:58 PM, Mahadevan, Sundar <Sundar.Mahadevan@xxxxxxx<mailto:Sundar.Mahadevan@xxxxxxx>> wrote: Hi All, Greetings. I get "SQL*Plus: Release 10.2.0.4.0 - Production" when I do a sqlplus -V without any mention if it is a 32 bit client or 64 bit client. Appreciate any help. Thanks in advance. --Sundar