[phenixbb] problem finding large no of sites in high symmetry

Hi, I am working with a data set collected in P23 space group. I am expecting 23 Se sites. Hyss gives me warning:run time error for finding large no of site. I did not interupt the run. I waited for 1hr and still it could not find sites. Shelx gave me out of 100 solutions only one had good CC and found 15 sites. IS there a way that this problem can be solved in hyss ? Thanks Banu