EPM System Installer installs both 32-bit and 64-bit Essbase Client on a machine with a 64-bit operating system.
If you want to use 32-bit and 64-bit client applications on the same machine, and you don't want to have to recompile applications, use the following procedure.
To use the 32-bit Runtime Client on a 64-bit Microsoft Windows machine:
On the 64-bit machine, run the precompiled 32-bit client program from a command prompt or from a shell window on which ESSBASEPATH is set to the installation directory of the 32-bit Runtime Client and PATH is set to include the bin subdirectory under the ESSBASEPATH directory.
For example, on Windows AMD64 set the following:
ESSBASEPATH=%EPM_ORACLE_HOME%\common\EssbaseRTC\11.1.2.0 PATH=%ESSBASEPATH%\bin;%PATH%
For information on Application Programming Interface and Runtime Client, see the Oracle Essbase API Reference.