MCSCF error "initial guess has wrong spin/symmetry"


Just Got Here
I am using version 6.1.1.

MCSCF method was used to calculate the grand state energy of a system with two atoms of manganese.

The calculation succeeded for all multiplicities below 11, but for multiplicity 11 exits with the error:

                detci: initial guess has wrong spin/symmetry        0

What could be the possible solution of the problem?
And why this error occurs only for this value of multiplicity?


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