:term:`WFN_SYM <WFN_SYM (MCSCF)>`
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      The symmetry of the SCF wavefunction.

      * **Type**: string
      * **Possible Values**: A, AG, AU, AP, APP, A1, A2, B, BG, BU, B1, B2, B3, B1G, B2G, B3G, B1U, B2U, B3U, 0, 1, 2, 3, 4, 5, 6, 7, 8
      * **Default**: 1