Use close_fds=True on Linux Systems. (I had hoped that this prevents the database deadlock which sometimes happens when multiple simulations finish at the same time, but it doesn't seem to fully suppress it. However, according to the discussion at http://bugs.python.org/issue7213 this can't hurt anyway.)
Use close_fds=True on Linux Systems. (I had hoped that this prevents the database deadlock which sometimes happens when multiple simulations finish at the same time, but it doesn't seem to fully suppress it. However, according to the discussion at http://bugs.python.org/issue7213 this can't hurt anyway.)

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