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Monte Carlo Ocean XL: can not delete history in a loop

Martyniuk

Dear All,

After moving to IC6.1.8-64b.500.7, my previously functioning MC scripts became more finicky about history entries.  Admittedly this previously working script had a lot of hacks in it. 

I have a loop where I want to overwrite the previous run's history and keep the same history name.

The error that I am stuck on is:

ERROR (EXPLORER-2406): A history entry named uncal.0 cannot be created.
There is already a history entry with that name.
Delete the existing entry or choose a different name.

My script has the following:

;ocnxlSetOverwriteHistory( t )
;ocnxlSetOverwriteHistoryName( "uncal.0" )
;ocnxlRenameCurrentHistory("old")
ocnxlHistoryPrefix( "uncal" )
ocnxlRun( ?mode 'monteCarlo ?nominalCornerEnabled t ?allCornersEnabled t ?allSweepsEnabled t)

The commented out lines were commands that I tried to overcome the error.  Is there a delete history command?  I figured that the two OverWrite commands would have worked.

The big picture is that I have a loop where a Monte Carlo simulation runs in order to calculate a correction, and then the simulation is rerun with the same seed and the correction applied.  During each iteration I do not want to accumulate data (psf files) after the outputs have been collected, so overwriting or deleting after each run would be sufficient.

Best regards,

Paul 

Parents
  • Martyniuk

    Some follow up:

    Since the error response guided me to delete or rename the history entry, and only renaming worked, I am going with the following ugly solution:

    ocnSetXLMode(“explorer”)

    ocnxlResultsLocation(    “/usr/simulation/mc_sim_results” )

    ocnxlSimResultsLocation( “/usr/simulation/mc_sim_results” )

    ocnxlHistoryPrefix( getCurrentTime() )

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

    system( “rm -rf /usr/simulation/mc_sim_results”)

    This will create unique history entries so they will never collide again, and instead of rewriting the previous data to keep the size down, a system command is used to delete the entire folder.  The reason I want to overwrite or delete each run is because the psf file is very large in order to preserve the data required to be post processed, but once it is boiled down to a few numbers it can be discarded.  Also, accumulating psf outputs for each MC run and doing a cleanup after all of the MC iterations would take an unreasonable amount of disk space.

    There has to be a better way to gracefully delete or overwrite previous MC runs.

    Best regards,

    Paul

  • Andrew Beckett
    in reply to Martyniuk

    Hi Paul,

    I reproduced the problem myself, and then did a bit of searching and found existing CCR 2107828 for this (it's recognised as an issue, but R&D have not yet fixed it due to other urgent commitments).

    I worked around the issue by using:

    ocnSetXLMode("assembler") ; rather than "explorer"

    and then:

    ocnxlHistoryPrefix("uncal")
    ocnxlSetOverwriteHistory(t)
    ocnxlSetOverwriteHistoryName("Next History Run")

    and then at the very end you'd need to do:

    ocnxlEndXLMode("assembler")

    Regards,

    Andrew.

  • Martyniuk
    in reply to Andrew Beckett

    Hi Andrew,

    Your solution works well. 

    Thanks,

    Paul

Reply
  • Martyniuk
    in reply to Andrew Beckett

    Hi Andrew,

    Your solution works well. 

    Thanks,

    Paul

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