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oceanXL/Monte Carlo error: "return can only be used within a prog"

RFdog

Greetings,

I'm a reasonably proficcient skill/ocean user, but have not worked with oceanXL before.  I'm trying to create a monte-carlo script with oceanXL which will run a certain monte-seed, update some parameters, then re-run the same seed.  Should be easy.... as a first step, I exported an ocean script (FILE--> Save Script) from a working ADEXL Monte-Carlo simulation.  The script looks complete and has no obvious errors.  The last line in the script is:

 ocnxlRun( ?mode 'monteCarlo ?nominalCornerEnabled t ?allCornersEnabled t ?allSweepsEnabled t)

This always errors-out with:

 *Error* return: return can only be used within a prog

version 6.1.5-64b.500.17 (using GXL license for XL)

 thoughts?

 

 

  • Andrew Beckett

    The best thing is to contact customer support over this. I've not seen this before. You might get a bit more info by doing:

    sstatus(errsetTrace t)
    _stacktrace=50

    before loading the script. But even then, it will probably need support input.

    Regards,

    Andrew.

  • RFdog

    I've opened a support ticket. Also some more info: I created a simple circuit with an ideal voltage source, gnd, and resistor. Another non-ideal resistor forms a voltage divider such that the midpoint varies with monte-carlo analysis. Same symptom: I can run just fine through the GUI, but not with ocnxl. Auto-generated script is included below for 10x monte runs (model file path removed for IP reasons) 

    (EDIT: unix2dos fix) 

    ;---------- Test "drm_test:junk3:1" -------------

    ocnxlBeginTest("drm_test:junk3:1")
    simulator( 'spectre )
    design( "drm_test" "junk3" "schematic")
    modelFile( '("" "mc_lib") )
    analysis('dc ?saveOppoint t ?param "temp" ?start "-40" ?stop "125" ?lin "10" )
    saveOption( 'currents "selected" )
    saveOption( 'save "selected" )
    save( 'v "/vmid" )
    temp( -40.0 )
    ocnxlOutputSignal( "/vmid" ?save t)
    ocnxlEndTest() ; "drm_test:junk3:1"

    ;====================== Sweeps setup ===========================================

    ;====================== Model Group setup ==========================================

     ;====================== Corners setup ==========================================

    ;====================== Job setup ==============================================

    ocnxlJobSetup( '( "blockemail" "1" "configuretimeout" "300" "distributionmethod" "Local" "lingertimeout" "300" "maxjobs" "1" "name" "ADE XL Default" "preemptivestart" "1" "reconfigureimmediately" "1" "runtimeout" "-1" "showerrorwhenretrying" "1" "showoutputlogerror" "0" "startmaxjobsimmed" "1" "starttimeout" "300" ) )

    ;====================== Disabled items =========================================

    ;====================== Run Mode Options ====================================== ocnxlSweepsAndCornersOptions( ?submitpointsenabled "0" )
    ocnxlMonteCarloOptions( ?mcMethod "all" ?mcNumPoints "10" ?mcNumBins "" ?mcStopEarly "0" ?mcYieldTarget "99.73" ?mcYieldAlphaLimit "0.05" ?samplingMode "random" ?saveProcess "1" ?saveMismatch "0" ?useReference "0" ?donominal "1" ?saveAllPlots "1" ?monteCarloSeed "1" ?mcStartingRunNumber "" )
     ;====================== Starting Point Info ======================================  


    ;====================== Run command ============================================
    ocnxlRun( ?mode 'monteCarlo ?nominalCornerEnabled t ?allCornersEnabled t ?allSweepsEnabled t)
    ocnxlOutputSummary(?yieldSummary t ?exprSummary nil ?specSummary nil ?detailed nil)

    ;====================== End XL Mode command ===================================
    ocnxlEndXLMode()

  • Tawna

    If you've opened a Case with Customer Support, please work with the AE assigned to you.

    (It's not a good use of resources to have multiple people working in parallel on the same issue...particularly when they don't know and cannot collaborate.)

    Thanks!

     

    best regards,

    Tawna

  • RFdog

    So here's the solution:

    The problem is related to a (now) known bug where ADEXL doesn't clear completely even when you "close data".  This was hitting me since I was running the script from the CIW window in the same cadence session as I had previously saved the script from.

    If I modify the script to open the cellview in read mode and *also* run the script only from a clean / new cadence session then the error goes away.  

    To open in read-mode:

    Existing => ocnxlTargetCellView( "myoalib" "ampTest" "adexl" )
    Modify To => ocnxlTargetCellView( "myoalib" "ampTest" "adexl" ?mode "r") 
     
    //dan. 

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