仿真时老出现这样的语句不能仿真,大侠们侃侃有可能是什么问题呢

Launching Application for process "Generate Expected Simulation Results".

Reading C:/Modeltech_xe/tcl/vsim/pref.tcl

# 5.6e

# do aa.ado
listening on address 127.0.0.1 port 1200
# ** Warning: (vlib-34) Library already exists at "work".
# resume
# Model Technology ModelSim XE II vcom 5.6e Compiler 2002.10 Oct 22 2002
# -- Loading package standard
# -- Loading package std_logic_1164
# -- Loading package std_logic_arith
# -- Loading package std_logic_unsigned
# -- Compiling entity count
# -- Compiling architecture behavioral of count
# Model Technology ModelSim XE II vlog 5.6e Compiler 2002.10 Oct 22 2002
# -- Compiling module aa
#
# Top level modules:
#  aa
# vsim -lib work -t 1ps aa
# Loading work.aa
# XE version supports only a single HDL
# ** Error: (vsim-3039) aa.ant(23): Instantiation of 'count' failed.
#         Region: /aa
# Error loading design
Error loading design
ERROR: VSim failed to simulate annotated testbench