エラーは回避できないもの

ERROR:Pack:1107 - Unable to combine the following symbols into a single IOB

   component:

   	PAD symbol "CLK333MN" (Pad Signal = CLK333MN)

   	SlaveBuffer symbol

   "mem_interface_top_infrastructure/lvds_sys_clk_input/SLAVEBUF.DIFFIN" (Output

   Signal = mem_interface_top_infrastructure/lvds_sys_clk_input/SLAVEBUF.DIFFIN)

   	SlaveBuffer symbol

   "ddr2_sdram/u_ddr2_infrastructure/DIFF_ENDED_CLKS_INST.SYS_CLK_INST/SLAVEBUF.

   DIFFIN" (Output Signal =

   ddr2_sdram/u_ddr2_infrastructure/DIFF_ENDED_CLKS_INST.SYS_CLK_INST/SLAVEBUF.D

   IFFIN)

   The component already has an input slave buffer.