To run DirectConnect for Oracle, you must set the following environment variables:
SYBASE
SYBASE_OCS
SYBASE_DCO
These Sybase-specific environment variables are set in the SYBASE.csh file in UNIX. You must source this file. In the Windows environment, variables have already been defined in the registry, or you can use the %SYBASE%\DCO-12_6\DCO_SYBASE.bat file.
Environment variables can be set in an MS-DOS window before starting DirectConnect for Oracle. They can also be set from the System menu in the Windows Control Panel. If DirectConnect for Oracle is running as a service, set these variables as System Environment Variables.