An Interna Error while using quartus II 9.0

Interna Error: Sub-system:BPM,File:/quartus/db/bpm/bpm_boundary_port_manager_impl.cpp,Line:110 m_netlist Stack Trace: 0x619F: BPM_BOUNDARY_PORT_MANAGER_IMPL::BPM_BOUNDARY_PORT_MANAGER_IMPL+0x9...