[DRC RTSTAT-1] Unrouted nets: 1 net(s) are unrouted
[DRCRTSTAT-1]Unroutednets:1net(s)areunrouted.Theproblembus(es)and/ornet(s)aresystem_i/dru_clk/gt_refclk_buf/U0/IBUF_OUT[0].CRITICALWARNING:[Route35-54]Net:system_i/dru_clk/gt_refclk_buf/U0/IBUF_OUT[0]