ISE MAP的时候出错

117454615

错误如下
2 h* l1 @: W' KERRORack:679 - Unable to obey design constraints (LOC=CLB_R38C1.S0) which
# b2 t- V+ _' q' o) b   require the combination of the following symbols into a single SLICE
   component:
# b, p. O& I: W( @. R! `5 Y( D           FLOP symbol "Chain[37].uChain/Node[0].uNode0/uFdce" (Output Signal =
   Chain[37].uChain/wOutA0<0>)
- H: K! |  V+ V# U! o" J* k, h           FLOP symbol "Chain[37].uChain/Node[0].uNode1/uFdce" (Output Signal =
   Chain[37].uChain/wOutA1<0>)
   The set/reset signal Reset_IBUF_1 of register
+ v! }2 I% Q9 J( S; _   Chain[37].uChain/Node[0].uNode1/uFdce doesn't match the existing usage of the
   SR MUX.  The signal Reset_IBUF_2 already uses SR.  Please correct the design
) `  `( A; Z8 g! v7 [; r2 r   constraints accordingly.
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