A problem of spectre simulation 

 Hard to tell without seeing the netlist. You also didn't say what version you're using.

Andrew.

Hi Andrew, the version of my spectre is 5.10.41_USR3.102405, my circuits is shown as below, it's a very simple circuit:

// Generated for: spectre

// Generated on: Oct 23 15:36:08 2012

// Design library name: spec

// Design cell name: nmostest1

// Design view name: schematic

simulator lang=spectre

global 0 vdd!

parameters l=0.18u Id=1u

include "/home/heli/xtp/char018/designfile/IC/pdk/chrt018IC_DK010_Rev11/1P6M/models/YI-093-SM011/spectre/design.scs"

include "/home/heli/xtp/char018/designfile/IC/pdk/chrt018IC_DK010_Rev11/1P6M/models/YI-093-SM011/spectre/sm093011-12.scs" section=fs

// Library name: spec

// Cell name: nmostest1

// View name: schematic

MN0 (net4 net4 0 0) nmos_1p8 w=(460n) l=180n as=(0.2208p) ad=(0.2208p) \

        ps=(1.88u) pd=(1.88u) nrd=1.043478 nrs=1.043478 m=(1)*(1) \

        par=((1)*(1)) dtemp=0

I4 (vdd! net4) isource dc=Id type=dc

V0 (vdd! 0) vsource dc=1.8 type=dc

simulatorOptions options reltol=1e-3 vabstol=1e-6 iabstol=1e-12 temp=27 \

    tnom=27 scalem=1.0 scale=1.0 gmin=1e-12 rforce=1 maxnotes=5 maxwarns=5 \

    digits=5 cols=80 pivrel=1e-3 ckptclock=1800 \

    sensfile="../psf/sens.output" checklimitdest=psf 

dcOp dc write="spectre.dc" maxiters=150 maxsteps=10000 annotate=status

dcOpInfo info what=oppoint where=rawfile

dc dc dev=MN0 param=l start=180n stop=2u oppoint=rawfile maxiters=150 \

    maxsteps=10000 annotate=status

modelParameter info what=models where=rawfile

element info what=inst where=rawfile

outputParameter info what=output where=rawfile

designParamVals info what=parameters where=rawfile

primitives info what=primitives where=rawfile

subckts info what=subckts  where=rawfile

saveOptions options save=allpub

Thanks a lot for your reply 

The netlist didn't help very much, because it doesn't even mention the parameter it is complaining about (presumably that's in the model files, which you must not post here because they're from Chartered and you would not be allowed to post them without breaking an NDA). However, you are using a version of spectre from 7 years ago, and in fact it's a update of a release which was released 8 years ago. I would be surprised if the models are intended to be used with such an old version (I can see very little reason to use it either). So, I would suggest installing an up to date MMSIM release (put <MMSIMinstDir>/tools/bin in your UNIX path before the <ICinstDir>/tools/bin so that it picks up the MMSIM version of spectre rather than the IC version, and try again.

If that doesn't help, contact customer support or go via your University Programme (e.g. Europractice) if you are a University user.

Regards,

Andrew.

Hi Andrew, the parameter is in model file indeed, so I can not post here, but I think you are right, the version of spectre I'm using is too old, I'll take your advise that using new version spectre.Thanks, Andrew, your suggestion help me a lot.

Regards, HeLi