:term:`HESSIAN_WRITE <HESSIAN_WRITE (FINDIF)>`
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      Do write a hessian output file? If so, the filename will end in .hess, and the prefix is determined by :term:`WRITER_FILE_LABEL <WRITER_FILE_LABEL (GLOBALS)>` (if set), or else by the name of the output file plus the name of the current molecule.

      * **Type**: :ref:`boolean <op_c_boolean>`
      * **Default**: false