ncx 做demo的lib，出现cell fail ，有懂的帮忙看看吗？

xgreatful

total program time         : 258.661 seconds (4.31 min.)


Failed cells [2/2] (32 arcs):
  DFBFB1
    non_seq_setup_rising arc 2: SDN -> CDN () (simulation) vCDN_SDN_0002r
    removal_falling arc 1: CPN -> CDN () (simulation) vCDN_CPN_0001r
    recovery_falling arc 0: CPN -> CDN () (simulation) vCDN_CPN_0000r
    CDN (simulation) mCDN_CDN_0003r
    removal_falling arc 2: CPN -> SDN () (simulation) vSDN_CPN_0002r
    recovery_falling arc 1: CPN -> SDN () (simulation) vSDN_CPN_0001r
    non_seq_setup_rising arc 0: CDN -> SDN () (simulation) vSDN_CDN_0000r
    SDN (simulation) mSDN_SDN_0003r
    CPN (simulation) mCPN_CPN_0000f
    CPN (simulation) mCPN_CPN_0000r
    hold_falling arc 1: CPN -> D () (simulation) vD_CPN_0001f
    hold_falling arc 1: CPN -> D () (simulation) vD_CPN_0001r
    setup_falling arc 0: CPN -> D () (simulation) vD_CPN_0000f
    setup_falling arc 0: CPN -> D () (simulation) vD_CPN_0000r
    D (simulation) cQ_Dr
    D (simulation) cQ_Df
    positive_unate clear arc 0: CDN -> Q () (simulation) tQ_CDN_0000r
    positive_unate clear arc 0: CDN -> Q () (simulation) tQ_CDN_0000f
    non_unate falling_edge arc 1: CPN -> Q () (simulation) tQ_CPN_0001r
    non_unate falling_edge arc 1: CPN -> Q () (simulation) tQ_CPN_0001f
    non_unate falling_edge arc 1: CPN -> CPN () (simulation) cQ_CPN_0001r
    negative_unate preset arc 2: SDN -> Q () (simulation) tQ_SDN_0002r
    negative_unate preset arc 2: SDN -> SDN () (simulation) cQ_SDN_0002r
    negative_unate preset arc 0: CDN -> QN () (simulation) tQN_CDN_0000r
    negative_unate preset arc 0: CDN -> CDN () (simulation) cQN_CDN_0000r
    non_unate falling_edge arc 1: CPN -> QN () (simulation) tQN_CPN_0001r
    non_unate falling_edge arc 1: CPN -> QN () (simulation) tQN_CPN_0001f
    non_unate falling_edge arc 1: CPN -> CPN () (simulation) cQN_CPN_0001r
    positive_unate clear arc 2: SDN -> QN () (simulation) tQN_SDN_0002r
    positive_unate clear arc 2: SDN -> QN () (simulation) tQN_SDN_0002f
  INV0D1
    negative_unate combinational arc 0: I -> ZN () (simulation) tZN_I_0000r
    negative_unate combinational arc 0: I -> ZN () (simulation) tZN_I_0000f

NOTE:

用的是安装好的demo做例子来跑，怎么会有问题呢？