在modelsim 6.2仿真的时候出现了 # Error loading design

# vsim -gui -sdftyp {/=C:/Users/stoien/Desktop/my homework/New folder/simulation/modelsim/writing_v.sdo} -sdfnoerror -sdfnowarn work.writing_Top
# // ModelSim ALTERA 6.1g Aug 12 2006
# //
# // Copyright 2006 Mentor Graphics Corporation
# // All Rights Reserved.
# //
# // THIS WORK CONTAINS TRADE SECRET AND
# // PROPRIETARY INFORMATION WHICH IS THE PROPERTY
# // OF MENTOR GRAPHICS CORPORATION OR ITS LICENSORS
# // AND IS SUBJECT TO LICENSE TERMS.
# //
# Loading work.writing_Top
# Loading work.writing
# Loading work.cycloneii_lcell_comb
# Loading work.cycloneii_io
# Loading work.cycloneii_mux21
# Loading work.cycloneii_dffe
# Loading work.cycloneii_asynch_io
# Loading work.cycloneii_clkctrl
# Loading work.cycloneii_mux41
# Loading work.cycloneii_ena_reg
# Loading work.cycloneii_lcell_ff
# Loading work.CYCLONEII_PRIM_DFFE
# ** Fatal: SDF files require Altera primitive library
# Time: 0 ps Iteration: 0 Instance: /writing_Top File: C:/Users/stoien/Desktop/my homework/New folder/simulation/modelsim/writing_top.v
# FATAL ERROR while loading design
# Error loading design

首先SDF文件加载错误，其实缺少库，一是看你使用的Modelsim版本，区分SE和Altera，另外是，加载SDF文件的时候，需要加载源文件中的SDO文件和生成条件的SDO文件。

没看懂什么意思？

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