The Smart 3D administrative computer is required to have all the servers registered that are participating in the workshare. The administrative machine executes the Duplicate Model for Workshare Command for all locations, which is essential for the proper generation of replication scripts.
When you execute the Duplicate Model for Workshare Command or Consolidate Model from Workshare Command in Smart 3D, the software performs an Oracle connection to the Host and all Satellite servers involved in the Global Workshare Configuration. To do so, all Oracle instances must be registered on the Smart 3D administrative machine. If the connection cannot be established to one or more servers, the operation fails and must be aborted.
See Configure Oracle Net Services in the Smart 3D Installation Help