Why hsp-vacomp: Error: File not found 'constants.h' in search path '.'?

[neoflash]

My hspice 2008.10 can run normal simulations.

However, when get to verilogA models, it will complain something weird.

  During .hdl command processing, loading Verilog-A modules from
        './dac.va'.
 hsp-vacomp: 
 hsp-vacomp: Invoking the Verilog-A compiler for '/home/hbi/proj/test_jan2012/sim/hspice_demos/veriloga/dac.va'
 hsp-vacomp: Synopsys HSPICE Verilog-A Compiler Version 1.60.802.081308.
 hsp-vacomp: Copyright (C) 2008 Synopsys, Inc. All Rights Reserved.
 hsp-vacomp: 
 hsp-vacomp: Error: File not found 'constants.h' in search path '.'.
 hsp-vacomp:    ['dac.va',10]
 hsp-vacomp:    `include "constants.h"
 hsp-vacomp:                          ^
 
 ** error **
 During Verilog-A Device processing:
    Failed to generate the loadable component names file from the Verilog-A File,
        'dac.va'.

I do have those files at:
/eda/hspice/B-2008.09/hspice/linux/veriloga_utils/veriloga/include

My hspice binary file locates at:
/eda/hspice/B-2008.09/hspice/linux/

I invoke hspice from over there /eda/hspice/B-2008.09/hspice/linux/hspice .