With Replication Server 15.7.1, Replication Server installation media does not include Replication Manager and Replication Monitoring Services (RMS).
Replication Server 15.7.1 includes Sybase Control Center which you can use to manage your replication system. See Sybase Control Center 3.2.6 for Replication.
To continue using Replication Manager and Replication Monitoring Services, download and install these tools under Replication Server in the Sybase Web site.
Route upgrade in the Replication Manager plug-in to Sybase Central is deprecated. Use the sysadmin upgrade "route" Replication Server command instead. See Upgrading Routes in the Replication Server Configuration Guide.