open shell mp2 directive


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Gets Around
Hi,
I'm trying to calculate `direct_mp2` for 2 monomers. Using the following code so far. But for even number of electrons it crashes. The directive I've been using:
start dimer
geometry units angstrom
  #symmetry c1
  N 13.356 -4.360 16.307;H 12.631 -4.575 16.716;N 11.384 -5.455 18.225;C 10.267 -4.749 18.620
end

basis "ao basis"
  N library 6-311+g*
  H library 6-311+g*
  O library 6-311+g*
  C library 6-311+g*
  bqN library N 6-311+g*
  bqH library H 6-311+g*
  bqO library O 6-311+g*
  bqC library C 6-311+g*
end

mp2
  freeze atomic
end

bsse
 mon first 1 2
 mon second 3 4
end

task direct_mp2 energy


But it gives me following error message:
              monomer     first      :   1  2
              monomer     second     :   3  4


                              BSSE Energy Correction
                              ----------------------


 ------------------------------------------------------------------------
 scf: no. of closed-shell electrons is not even!                   0
 ------------------------------------------------------------------------
 ------------------------------------------------------------------------
  current input line : 
    31: task direct_mp2 energy
 ------------------------------------------------------------------------
 ------------------------------------------------------------------------
 There is an error in the input file
 ------------------------------------------------------------------------
 For more information see the NWChem manual at http://nwchemgit.github.io/index.php/NWChem_Documentation


 For further details see manual section:                                                                                                                                                                                                                                                                
0:0:scf: no. of closed-shell electrons is not even!:: -1
(rank:0 hostname:cn0090 pid:22553):ARMCI DASSERT fail. ../../ga-5-3/armci/src/common/armci.c:ARMCI_Error():208 cond:0
Last System Error Message from Task 0:: Illegal seek
--------------------------------------------------------------------------
MPI_ABORT was invoked on rank 0 in communicator MPI COMMUNICATOR 4 DUP FROM 0 
with errorcode -1.

NOTE: invoking MPI_ABORT causes Open MPI to kill all MPI processes.
You may or may not see output from other processes, depending on
exactly when Open MPI kills them.
--------------------------------------------------------------------------


Little suggestions regarding that would be highly appreciated.