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I met a problem when I was loading an fine-tuned ocean script in current server env which worked well in a previous server env.
The code used to be loaded well in another server and it is a simulation script for an LNA circuit. Right now I just paste the code and hopefully you are interested.When I was loading the ocean script, error came out as:
*Error* ilGetString: arg must be symbol or string - nil
This may be due to license problem, like any features not supported ,etc. Or maybe it is a format error considering skill language.I provide the problematic sample.ocn code in two parts: Run-through part and error-warning part. I am a starter and hope any one give a help. Appreciate your participating.
The code can be successfully loaded the first half:
simulator( 'spectre )design( "./netlist")resultsDir( "./schematic" )modelFile( "./mitllfdsoi0p18um/MP6_2p2/models/spectre/nom/mitllfdsoi0p18um.scs")desVar( "cw3" 10f )desVar( "cw1" 10f )desVar( "rw3" 1 )desVar( "rw1" 1 )desVar( "rls" 2 )desVar( "rlg" 7 )desVar( "rld" 6 )desVar( "rg" 0.5 )desVar( "Ls" .65n )desVar( "Lg" 2n )desVar( "Ld" 2.3n )desVar( "cds" 28.8f )desVar( "Cd" 160f )desVar( "Co" 120f )desVar( "cw4" "cw3" )desVar( "cw2" "cw1" )desVar( "rw4" "rw3" )desVar( "rw2" "rw1" )Cnominal = desVar( "Cnominal" 0 )Rnominal = desVar( "Rnominal" 0 )R14 = desVar( "R14" 0) desVar( "C14" Cnominal )R18 = desVar( "R18" 0) desVar( "C18" Cnominal )R15 = desVar( "R15" 0) desVar( "C15" Cnominal )R19 = desVar( "R19" 0) desVar( "C19" Cnominal )R24 = desVar( "R24" 0) desVar( "C24" Cnominal )R23 = desVar( "R23" 0) desVar( "C23" Cnominal )R25 = desVar( "R25" 0) desVar( "C25" Cnominal )R26 = desVar( "R26" 0) desVar( "C26" Cnominal )desVar( "frf" 5.6G )desVar( "df" 10M )desVar( "frf2" "frf+df" )desVar( "prf" -30 )temp( 27 ) ResDir = "./sample"resultsDir(ResDir)sprintf( resultsFile "%s.txt" ResDir )of = outfile(resultsFile)startPoint = 2stopPoint = 2totalPoints = 1resistorList = list("rls")
But when the second half below is loaded, the error came out". The second half is:
foreach( sweepVariable resistorList
paramAnalysis(sweepVariable ?start startPoint ?stop stopPoint ?lin totalPoints)
;S-Parameter analysis analysis('sp ?ports list("/PORT1" "/PORT2") ?start "400M" ?stop "8G" ?lin "601" ?donoise "yes" ?oprobe "/PORT2" ?iprobe "/PORT1" )
;1dB compression point and IIP3;;Periodic Steady State analysis('pss ?fund "frf" ?harms "20" ?errpreset "moderate" ?param "prf" ?start "-30" ?stop "10" ?lin "20" ) analysis('pac ?sweeptype "absolute" ?start "frf2" ?stop "" ?maxsideband "2" )
;;;;;5.6GHz freq = 5.6e+09
;Input Port Reflection (S11);measured @ 5.6G (lower s11 is better) s11 = value(dB20(aaSP(1 1)) freq); s12 = value(dB20(aaSP(1 2)) freq); s21 = value(dB20(aaSP(2 1)) freq) s22 = value(dB20(aaSP(2 2)) freq);minimum input reflection in frequency range simulated;minreflection = ymin(dB20(aaSP(1 1)));other S-parameters
;Noise Figure noiseFigure = value(dB10(NF()) freq);noiseFigureMin = value(dB10(NFmin()) freq)
;Gain; transducerPowerGain = value(dB10(GT()) freq); operatingPowerGain = value(dB10(GP()) freq) availablePowerGain = value(dB10(GA()) freq) ;selectResults('sweeppss_fd-sweep); onedBcompPt = compressionVRI((v("/net016" ?result "pss_fd") - 0.0) '1 ?rport resultParam("PORT2:r" ?result "pss_fd") ?gcomp 1);selectResults('sweeppss_pac-sweeep) iip3 = ipnVRI((v("/net016" ?result "pac") - 0.0) '-2 '0 ?rport resultParam("PORT2:r" ?result "pac"))
;;;;;header; fprintf(of ; "%s\ts11\ts12\ts21\ts22\;\tnoiseFigure\ttransducerPowerGain\toperatingPowerGain\tavailablePowerGain\tonedBcompPt\tiip3\n" sweepVariable) fprintf(of "%s\ts11\ts22\tnoiseFigure\tavailablePowerGain\tiip3\n" sweepVariable); ocnPrint( s11 s12 s21 s22 noiseFigure transducerPowerGain operatingPowerGain availablePowerGain onedBcompPt iip3 ?output of) ocnPrint( s11 s22 noiseFigure availablePowerGain iip3 ?output of) ) ; foreach(sweepVariable resistorList
By the way, our department has just updated its cadence license packet which was actually problematic.
Thanks a lot before hand and after.
Bit hard to debug without the data, but what I would try is to type:
in the CIW and then load the OCEAN script from there to see if it gives any more clues in the stacktrace that ensues when the error occurs.