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Ocean XL: running the same script twice makes the CIW stuck

MC20250412421

Hi everyone !

So I have a ADE assembler cellview with a single test: a simple single run transient simulation (nominal corner only) of a circuit.

When using the ADE assembler GUI as I would do normally, the whole simulation takes exactly 30 seconds.
Without changing anything I then go to "File > Save Script" to export the ocean XL script, close the assembler view and then in the CIW I type:

load("ocnScript.ocn")

The first time I run the command it takes exactly 40 seconds. The second time I run the command in the same CIW, the "Run setup summary" appears quickly but then it gets stuck indefinitely on "Entering Optimize Single Point Run netlisting..." and I need to force kill virtuoso (pkill -9 virtuoso) for it to even close. Using the assembler GUI I can launch the simulation as many times as I want.
Any ideas of how I can fix that ?

Thanks in advance !

Mike

  • Andrew Beckett

    Mike,

    I don't see this, but maybe there's a dependency on the version you're using or exactly how the simulation is set up. I would recommend contacting customer support (use the Case menu to submit a support case after logging in) to investigate further.

    An alternative (and simpler approach) is to use the mae functions instead to avoid having to replicate the whole setup in a script. You can then use:

    maeOpenSetup(...)
    maeRunSimulation(...)
    maeCloseSession()

    If you need to vary things from the ADE setup, you can do that too. For me, this is preferable over having a fixed snapshot of the setup in an OCEAN script.

    Regards,

    Andrew

  • MC20250412421
    in reply to Andrew Beckett

    Thank you very much for the quick response Andrew, I did not think about mae functions but they seem quite simple, the axl functions too, I will probably use them a lot.

    I have another more general question for this since you have experience with all of this.
    If you must run simulations that calculate complex metrics and has conditional execution of runs (running new simulations with new design variables based on the calculated metrics), what group of functions would you generally use ? mae, axl, ocean, ocean xl... ? 

  • Andrew Beckett
    in reply to MC20250412421

    Much of this can be done with Run Plans in ADE Assembler anyway, and that also allows for the use of "mae" functions for more complex scripts to compute dependencies between runs. However, if you need more than that provided by Run Plans then I'd use mae functions to do it (occasionally you might have to revert to axl or asi functions if there are gaps, but the mae API covers most things and is simpler to use)

    Andrew

  • MC20250412421
    in reply to Andrew Beckett

    You're right, run plans are a very nice feature to have which I did not know existed. But I still do like the more scalable and predictable nature of scripts compared to gui features. I think I'll settle like you said with a blend of both depending on what the tool allows me to do.

    Thanks a lot for the help Andrew !

    Mike

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