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Oceanscript fails to carry on once a simulation bombs

uzzy
Hello, I use oceanscripting to run my PVT sims in Cadence. However, while running the oceanscript, I have observed that if the simulation fails( due to some convergence issues) during one of the conditions in the script and the evaluated result returns "nil", printf/fprintf functions cannot handle "nil" data and thereby the script bombs and the rest of the conditions in the oceanscript do not get simulated. I would like to know if there is a workaround for this problem. Is there a way I could print the "nil" result as 0.0 in my result file and make the oceanscript carry on with the rest of the simulation conditions. Regards, Uzzy

  • Hi Uzzy

    Would using %L in your printf/fprintf cmds in place of %s, %d, %f, etc help? Or perhaps you can add a check in your script to detect nil results:

    unless( results
       results="0.0"
    ) ;unless

    printf("Results are %g\n" results)


    Best regards
    Quek

  •  Uzzy,

    I tend to use things like:

    when(member('tran results())
      ; do the stuff that depends upon the transient having run
    )

    If the tran didn't run because of a problem (you could use a similar approach for other analyses), there will be no results in the simulation result database - so checking for it is an easy way of catching gross failure.

    Alternatively, using the approach proposed by Quek (the unless bit) is a good idea. I'm less keen on the %L approach - it's less flexible in how it can be formatted, and it doesn't help if you tried doing:

    outData=v("/out" ?result 'tran)
    double=outData*2

    in this case the double calculation will fail if the tran results are not present, because it will try to do nil*2.

    Regards,

    Andrew.

  • Thank you both for the solutions.

  • Hi Uzzy,

    I wanted to add to what Quek and Andrew have suggested.  If you did not need to perform any calculation, just printing, you might use a variation on Quek's method that is a little more succinct:

    
  printf("Results are %g\n" results || 0.0) ;; supplies 0.0 result if "results" is nil

    By the way, in Quek's post there are double quotes around the 0.0 but I don't think they should be there.

    Best regards,

    Lawrence.

  • Hi Lawrence

    Thanks. : )

    Best regards
    Quek

  • Hey Lawrence, Thanks for the solution. Regards, Uzzy

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