求教 Vivado 问题！vivado 2015.3 generate bitstream 后报错？

  

dear all:求教 Vivado 问题！
vivado 2015.3  generate bitstream 后报错：
[DRC 23-20] Rule violation (REQP-38) connects_RST_ACTIVE - U8/AcqLoopFIFO/U0/inst_fifo_gen/gconvfifo.rf/gbi.bi/v7_bi_fifo.fblk/gextw[10].gnll_fifo.inst_extd/gchain.gp1[1].gbldc.inst_prim/gf36e1_inst.sngfifo36e1: RST pin should always have ACTIVE signal for FIFO operation.