[main] INFO org.opendaylight.transportpce.tapi.utils.TapiContext - TAPI context created successfully.
[main] INFO org.opendaylight.transportpce.tapi.topology.TapiTopologyImpl - Building TAPI Topology abstraction for T0 - Multi-layer topology
[main] ERROR org.opendaylight.transportpce.tapi.topology.TapiTopologyImpl - error building TAPI topology