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IOP(2/16=0)Abort the job. IOP(2/16=1)Keep going. IOP(2/16=2)Keep going and leave symmetry on, using the old symmetry. IOP(2/16=3)Keep going and leave symmetry on, using the new symmetry IOp(17) Tolerance for distance comparisons in symmetry determination. 0 Default (determined in the symmetry package, currently 1.d-8). N>0 10-N. N<0 10N, use the same tolerance for orientation. IOp(18) Tolerance for non-distance comparisons in symmetry determination. 0 Default (determined in the symmetry package, currently 1.d-7). N>0 10 -N. 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