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Handling optional outputs


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    Jason Cerrato

    Hi Matan,


    At this time, Cromwell doesn't support option file output in a task. This has been on the feature request list for some time now (see:

    However, this change is slated for the WDL v2.0 release (see:

    For now, you will need to use the workaround as you described it—creating an empty dummy file. If you have any questions, please let us know.


    Kind regards,


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