A　robust　transceiver　design　with　Tomlinson-Harashima　precoding　(THP)　for　QR　decomposition　(QRD)-based　multiuser　multiple-input　multiple-output　(MU-MIMO)　relaying　systems　is　proposed,　which　exploits　the　relationship　between　QRD　and　Gram-Schmidt　orthogonalization　(GSO)　to　jointly　optimize　the　transmit　precoder　and　receive　beamforming　vectors　of　users.　Then　we　propose　a　correlation-based　approach　which　leads　to　a　significant　reduction　of　forward　overhead　information　from　the　relay　to　all　MUs.　Finally　to　reduce　the　computational　complexity,　a　＂Best-Last＂　based　user　selection　scheme　is　proposed　which　has　a　performance　close　to　the　optimal　global　selection　approach.　Numerical　results　are　presented　to　demonstrate　the　advantages　of　the　proposed　robust　schemes.　©　2015　IEEE.