How to use Hspice mosra tools if set simmode=1 the demo in the handbook dosen't work

the demo in the hspice handbook for mosra simulation doesn't work if i fist set simmode=0 only do the fresh simulation to get *.radegfile0 file, and then set simmode=1 only to do the post-simulation. No degradation appears for the DC and AC analysis results.
BUT if I set simmode=2 to do fresh and post simulation at one time the output changed because of the degradation , however no dc or ac analysis is supported by Hspice. I don't know why the phenomenon appears. Please help me~~~

here is my source code

first：MOSRA DCAC TEST-0.sp set simmode=0 for pre-stress simulation to generate mosra dcac test-0.radeg0 file for post-simulation


* MOSRA DC/AC TEST
vdd 1 0 -2 ac=1
mp1 1 2 0 0 p1 l=0.1u w=10u ad=5p pd=6u as=5p ps=6u
vgs 2 0 -2

.model p1 pmos level=49 version=4.5

.model p1_ra mosra level=1
+tit0 = 5e-8 titfd = 7.5e-10 tittd = 1.45e-20
+tn = 0.25

.appendmodel p1_ra mosra p1 pmos
.mosra reltotaltime='10*365*24*60*60' lin=11 simmode=0
.tran .1ps 400ps
.dc vdd 0 -1.2 -0.1
.ac dec 1 1e5 1e9
.options post

.end


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second：MOSRA DCAC TEST.sp using mosra dcac test-0.radeg0 and simmode=1 for post-simulation，meanwhile DC and AC analysis. Here the strange thing the DC and AC output at every aging time point are the same with Pre-stress results，no aging happens???? WHY????

* MOSRA DC/AC TEST
.option radegfile ='mosra dcac test-0.radeg0'

vdd 1 0 -2 ac=1
mp1 1 2 0 0 p1 l=0.1u w=10u ad=5p pd=6u as=5p ps=6u
vgs 2 0 -2

.model p1 pmos level=49 version=4.5

.model p1_ra mosra level=1


.appendmodel p1_ra mosra p1 pmos
.mosra reltotaltime='10*365*24*60*60' lin=11 simmode=1

.dc vdd 0 -1.2 -0.1
.ac dec 1 1e5 1e9
.options post
.print dc i(vdd)

.end