"ERROR:Pack:679 - Unable to obey design constraints (MACRONAME = u0_u0/fifocore/control/rd_blk, RLOC = X2Y0), which require the combination of the following symbols into a single slice component: MUXCY symbol "u0_u0/BU421" (Output Signal = u0_u0/BU421/O) FLOP symbol "u0_u0/BU422" (Output Signal = u0_u0/N11670) LUT symbol "u0_u0/BU417" (Output Signal = u0_u0/N12596) MUXCY symbol "u0_u0/BU418" (Output Signal = u0_u0/BU418/O) FLOP symbol "u0_u0/BU419" (Output Signal = u0_u0/N11671)
The carry muxes are not connected in the required manner. Please correct the design constraints accordingly."