There are different ArcSDE binaries for Oracle 10g and 11g. I would recommend you use
the client at the same release as the server, and at a patch level at least as high (e.g.,
it should be okay to use a 10.2.0.8 client with a 10.2.0.7 database, but you shouldn't
use a 10.2.0.4 client to a 10.2.0.7 server).
- V