Modelsim altera ALTCLKCTRL not bound

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Hi, 

I am trying simulate a vhdl design which instantiates an ALTCLKCTRL. The following message display:    "Warning: (vsim-3473) Component instance "altclkctrl_0 : clk_wiz_2_altclkctrl_0" is not bound“.   I am quite sure that the instance match well with component interface declaration. And Library has been compiled.     My Quartus version 15.0; modelsim altera version:10.3d;    The Analysis & Elaboration has no warning. And sun the modelsim altera, the related transcripts of ALRCLKCTRL is as following:    Anyone know what happen and how to fix it? Any suggestion is appreciated. Thanks very much. # ##### Libraries for IPUTF cores # vlib UK7_BRAM1_DUT_top_iputf_libs/altclkctrl_0# ** Warning: (vlib-34) Library already exists at "UK7_BRAM1_DUT_top_iputf_libs/altclkctrl_0".# # vmap altclkctrl_0 ./UK7_BRAM1_DUT_top_iputf_libs/altclkctrl_0# Model Technology ModelSim PE vmap 10.3d Lib Mapping Utility 2014.10 Oct 7 2014# vmap -modelsim_quiet altclkctrl_0 ./UK7_BRAM1_DUT_top_iputf_libs/altclkctrl_0 # Modifying modelsim.ini# ##### End libraries for IPUTF cores # ##### MIF file copy and HDL compilation commands for IPUTF cores # # # vlog "C:/altera/15.0/MDA/UK7_BRAM1_DUT_NOCS/clk_wiz_2/simulation/submodules/clk_wiz_2_altclkctrl_0.v" -work altclkctrl_0# Model Technology ModelSim ALTERA vlog 10.3d Compiler 2014.10 Oct 7 2014# Start time: 19:58:31 on Feb 27,2016# vlog -reportprogress 300 C:/altera/15.0/MDA/UK7_BRAM1_DUT_NOCS/clk_wiz_2/simulation/submodules/clk_wiz_2_altclkctrl_0.v -work altclkctrl_0 # -- Compiling module clk_wiz_2_altclkctrl_0_sub# -- Compiling module clk_wiz_2_altclkctrl_0# # Top level modules:# clk_wiz_2_altclkctrl_0# End time: 19:58:31 on Feb 27,2016, Elapsed time: 0:00:00# Errors: 0, Warnings: 0