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 Harmonic balance GMRES Warnnings 

Last post Mon, Sep 16 2013 11:38 AM by Tawna. 3 replies.
Started by RFStuff 16 Sep 2013 02:54 AM. Topic has 3 replies and 1144 views
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  • Mon, Sep 16 2013 2:54 AM

    • RFStuff
    • Top 25 Contributor
    • Joined on Tue, Feb 5 2013
    • Posts 214
    • Points 3,780
    Harmonic balance GMRES Warnnings Reply

    Dear All,

    I got follwing wrannig while doing PAC with HB analysis.My HB-PSS setting is as below:-

     analysis('pss ?engine "Harmonic Balance"  ?flexbalance "yes"  ?oversamplefactor "2"  
            ?fund "2.5G"  ?harms "60"  ?errpreset "conservative"  ?tstab "50n"  
            ?oscana t  ?p "/V15"  ?n "/gnd!"  ?oscmethod ""  
            ?step ""  ?maxstep "0.4p"  ?write ""  ?writefinal ""  
            ?swapfile ""  ?checkpss ""  ?method "gear2only"  ?tstabmethod "gear2only"  
            ?relref "alllocal"  ?lteratio "10"  ?steadyratio "0.00001"  ?maxacfreq "200G"  
            ?ppv ""  ?backtracking ""  )

     option(    'iabstol  "1e-13"
        'vabstol  "3e-8"
        'reltol  "1e-6"
    )


    converge( 'ic "/V2" "1.3" )
    temp( 27 )

     

     Warning: GMRES did not converge to the desired tolerance of 1e-08. It actually converged to 0.000335882. The solution may not be accurate but it's saved anyway.

    Could anybody please tell why this warnning is arising. 

    Is it safe to ignore ?

    Kind Regards,

     

    • Post Points: 20
  • Mon, Sep 16 2013 3:16 AM

    Re: Harmonic balance GMRES Warnings Reply

    Please look at these two solutions - solution 11842556 and solution 11812142.

    Kind Regards,

    Andrew.

    • Post Points: 20
  • Mon, Sep 16 2013 6:01 AM

    • RFStuff
    • Top 25 Contributor
    • Joined on Tue, Feb 5 2013
    • Posts 214
    • Points 3,780
    Re: Harmonic balance GMRES Warnings Reply

    Thanks for your reply.

    My spectre version is:-

     sub-version  12.1.0.402.isr5

     

    Looks like I have to file a SR

     

    • Post Points: 20
  • Mon, Sep 16 2013 11:38 AM

    • Tawna
    • Top 25 Contributor
    • Joined on Thu, Jul 10 2008
    • Snohomish, WA
    • Posts 191
    • Points 5,155
    Re: Harmonic balance GMRES Warnings Reply

    Try downloading the latest MMSIM 12.1.1 version from http://downloads.cadence.com .

    If that doesn't fix the issue, then definitely please file a SR.

     

    best regards,

    Tawna

    Best regards, Tawna Wilsey Staff Support AE, Global Customer Support Cadence Design Systems, Inc.
    • Post Points: 5
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Started by RFStuff at 16 Sep 2013 02:54 AM. Topic has 3 replies.