Can I install the Migration Workbench into an Oracle home directory that contains a release of the Oracle Server earlier than Oracle9i?
No. The Migration Workbench contains Oracle9i release 1 dependencies. Therefore, you can only install the Migration Workbench into an Oracle9i release 1 home directory or into a new Oracle home directory. If you install the Migration Workbench into a new Oracle home directory, and there is already an Oracle server installed on the system you must launch the Home Selector from the Oracle Installation Products program group, to switch the default Oracle home directory to specify the previous Oracle installation. You must do this so that your system does not pick up the new client dependencies for other applications that you might use on the system.