.. _interface-analysis_drivers-fork-allow_existing_results:

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allow_existing_results
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Change how Dakota deals with existing results files


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**Specification**

- *Alias:* None

- *Arguments:* None

- *Default:* results files removed before each evaluation


**Description**


By default Dakota will remove existing results files before invoking
the ``analysis_driver`` to avoid problems created by stale files in the
current directory. To override this behavior and not delete existing
files, specify ``allow_existing_results``.