Hilti Profis Cast in anchor design for seismic

The following warning is presented "The selected anchor layout and baseplate shape combination is not allowed with seismic design." Annex C covers 4 anchors and when using (SOFA) method it is possible to model up to 8 anchors in seismic conditions, is it possible any other way to model up more then 8 anchors? if i have a combination of shear (140kn) and tension force (550kn) and 8 anchors are not enough ?