Ensure that you have installed Oracle Fusion Middleware SOA Suite and have created the Oracle MDS and OPSS schema. Oracle MDS schema is a prerequisite for the Oracle Fusion Middleware SOA Suite. Oracle OPPS schema is needed to extend the P6 EPPM Web Services domain to work with the Fusion MIddleware SOA Suite.
For information on how to create the Oracle MDS and OPSS schema, see the Oracle Fusion Middleware Creating Schemas with the Repository Creation Utility guide on Oracle Technical Network.