modelsim的问题希望可以得到解决

# Compile of lfsr4.vhd was successful.

# Compile of lfsr4_tb.vhd was successful.

vsim -sdftyp /tb=C:/modeltech_6.5/examples/A_study/lfsr4/lfsr4_vhd.sdo -novopt work.lfsr4_tb

# vsim -sdftyp /tb=C:/modeltech_6.5/examples/A_study/lfsr4/lfsr4_vhd.sdo -novopt work.lfsr4_tb 

# Loading std.standard

# Loading ieee.std_logic_1164(body)

# Loading ieee.std_logic_arith(body)

# Loading ieee.std_logic_unsigned(body)

# Refreshing C:\modeltech_6.5\examples\A_study\lfsr4\work.lfsr4_tb(behavioral)

# Loading work.lfsr4_tb(behavioral)

# SDF 6.5 Compiler 2009.01 Jan 22 2009

# 

# Refreshing C:\modeltech_6.5\examples\A_study\lfsr4\work.lfsr4(behaviorial)

# Loading work.lfsr4(behaviorial)

# Loading instances from C:/modeltech_6.5/examples/A_study/lfsr4/lfsr4_vhd.sdo

# ** Error: (vsim-SDF-3250) C:/modeltech_6.5/examples/A_study/lfsr4/lfsr4_vhd.sdo(39): Failed to find INSTANCE '\clk~I\'.

# ** Error: (vsim-SDF-3250) C:/modeltech_6.5/examples/A_study/lfsr4/lfsr4_vhd.sdo(39): Failed to find INSTANCE 'asynch_inst'.

# ** Error: (vsim-SDF-3250) C:/modeltech_6.5/examples/A_study/lfsr4/lfsr4_vhd.sdo(48): Failed to find INSTANCE '\clk~clkctrl\'.

# ** Error: (vsim-SDF-3250) C:/modeltech_6.5/examples/A_study/lfsr4/lfsr4_vhd.sdo(57): Failed to find INSTANCE 'extena0_reg'.

# ** Error: (vsim-SDF-3250) C:/modeltech_6.5/examples/A_study/lfsr4/lfsr4_vhd.sdo(210): Failed to find INSTANCE '\random[0]~I\'.

# ** Error: (vsim-SDF-3250) C:/modeltech_6.5/examples/A_study/lfsr4/lfsr4_vhd.sdo(210): Failed to find INSTANCE 'asynch_inst'.

# ** Error: (vsim-SDF-3250) C:/modeltech_6.5/examples/A_study/lfsr4/lfsr4_vhd.sdo(220): Failed to find INSTANCE '\random[1]~I\'.

# ** Error: (vsim-SDF-3250) C:/modeltech_6.5/examples/A_study/lfsr4/lfsr4_vhd.sdo(220): Failed to find INSTANCE 'asynch_inst'.

# ** Error: (vsim-SDF-3250) C:/modeltech_6.5/examples/A_study/lfsr4/lfsr4_vhd.sdo(230): Failed to find INSTANCE '\random[2]~I\'.

# ** Error: (vsim-SDF-3250) C:/modeltech_6.5/examples/A_study/lfsr4/lfsr4_vhd.sdo(230): Failed to find INSTANCE 'asynch_inst'.

# ** Error: (vsim-SDF-3250) C:/modeltech_6.5/examples/A_study/lfsr4/lfsr4_vhd.sdo(240): Failed to find INSTANCE '\random[3]~I\'.

# ** Error: (vsim-SDF-3250) C:/modeltech_6.5/examples/A_study/lfsr4/lfsr4_vhd.sdo(240): Failed to find INSTANCE 'asynch_inst'.

# ** Error: (vsim-SDF-3250) C:/modeltech_6.5/examples/A_study/lfsr4/lfsr4_vhd.sdo(83): Failed to find INSTANCE '\reset~I\'.

# ** Error: (vsim-SDF-3250) C:/modeltech_6.5/examples/A_study/lfsr4/lfsr4_vhd.sdo(83): Failed to find INSTANCE 'asynch_inst'.

# ** Error: (vsim-SDF-3250) C:/modeltech_6.5/examples/A_study/lfsr4/lfsr4_vhd.sdo(92): Failed to find INSTANCE '\reset~clkctrl\'.

# ** Error: (vsim-SDF-3250) C:/modeltech_6.5/examples/A_study/lfsr4/lfsr4_vhd.sdo(101): Failed to find INSTANCE 'extena0_reg'.

# ** Error: (vsim-SDF-3250) C:/modeltech_6.5/examples/A_study/lfsr4/lfsr4_vhd.sdo(194): Failed to find INSTANCE '\temp[0]\'.

# ** Error: (vsim-SDF-3250) C:/modeltech_6.5/examples/A_study/lfsr4/lfsr4_vhd.sdo(184): Failed to find INSTANCE '\temp[0]~feeder\'.

# ** Error: (vsim-SDF-3250) C:/modeltech_6.5/examples/A_study/lfsr4/lfsr4_vhd.sdo(168): Failed to find INSTANCE '\temp[1]\'.

# ** Error: (vsim-SDF-3250) C:/modeltech_6.5/examples/A_study/lfsr4/lfsr4_vhd.sdo(158): Failed to find INSTANCE '\temp[1]~feeder\'.

# ** Error: (vsim-SDF-3250) C:/modeltech_6.5/examples/A_study/lfsr4/lfsr4_vhd.sdo(142): Failed to find INSTANCE '\temp[2]\'.

# ** Error: (vsim-SDF-3250) C:/modeltech_6.5/examples/A_study/lfsr4/lfsr4_vhd.sdo(132): Failed to find INSTANCE '\temp[2]~feeder\'.

# ** Error: (vsim-SDF-3250) C:/modeltech_6.5/examples/A_study/lfsr4/lfsr4_vhd.sdo(116): Failed to find INSTANCE '\temp[3]\'.

# ** Error: (vsim-SDF-3250) C:/modeltech_6.5/examples/A_study/lfsr4/lfsr4_vhd.sdo(72): Failed to find INSTANCE '\temp[3]~11\'.

# ** Error: (vsim-SDF-3894) : Errors occured in reading and resolving instances from compiled SDF file(s).

# Error loading design