HALCON error #1302: Wrong value of control parameter: 2 in operator affine_trans_region

'constant', 'nearest_neighbor'

void Test()
        {
            HObject rRect;
            HOperatorSet.GenRectangle1(out rRect,0, 0, 100, 100);
            HTuple matIdentity;
            HOperatorSet.HomMat2dIdentity(out matIdentity);         
            HObject rDilation = new HObject();
            HOperatorSet.GenEmptyObj(out rDilation);
            HOperatorSet.AffineTransRegion(rRect, out rDilation, matIdentity, "nearest_neighbor");       
        }

HOperatorSet.AffineTransRegion(rRect, out rDilation, matIdentity, "true");