WARNING  ucdp_addr.addrmatrix  AddrMatrix(): AddrMaster(name='mst') has no slaves
WARNING  ucdp_addr.addrmatrix  AddrMatrix(): AddrSlave(name='slv') has no masters
WARNING  ucdp_addr.addrmatrix  Master 'foo' is not known
WARNING  ucdp_addr.addrmatrix  Slaves 'bar' is not known
