Stats

  • Locked Locked
  • Replies 3
  • Subscribers 126
  • Views 14464
  • Members are here 0
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Harmonic balance GMRES Warnnings

RFStuff

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,

 

Parents Reply Children
No Data

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.