If you’re using a 64 bit operating system and would like your Business Objects tools to function properly it is recommended to install both the 32 and 64 bit oracle clients. The Business Objects 4.0 OS is a 64bit Platform and when a 32-bit application that attempts to communicate with the server it doesn’t seem to translate well. 32 bit applications can’t use a 64 bit driver. Download both the 32 bit and 64 bit driver.
Oracle client download (32 bit)
Oracle client download (64 bit)