For Oracle compatibility, the Oracle client used must also be compiled for 64-bit. In order to use the supported 64-bit Oracle client, source the following scripts depending on your environment:
Development /afs/slac/g/lcls/tools/oracle/oracleSetup-R11.2.0.4.bash
Production /usr/local/lcls/tools/oracle/oracleSetup-R11.2.0.4.bash