I have installed Oracle client 64 bit software on windows 2008 R2 server. The Oracle database server 11g R2 is on Redhat Linux 5. The oracle client is able to connect with server by using SQLPLUS. But it is failed to connect to database from ArcGIS desktop 10.1 Does it require any additional config ?? Please help me.
If you have a 64-bit Oracle install, a 64-bit Server install and a 32-bit Desktop install on the same host, you may need to add both 32-bit and 64-bit Instant Client software to get the PATH to have the right clients in the right order.
Sometimes it helps to split up the software stack, and place Desktop on a different host, without the database or Server components to muddle the 32-bit/64-bit evaluation order.