Check the sort function is valid.
Check the sort function is valid.

sorgerlab/indra,sorgerlab/indra,sorgerlab/indra,johnbachman/indra,bgyori/indra,bgyori/indra,bgyori/indra,sorgerlab/belpy,johnbachman/indra,sorgerlab/belpy,sorgerlab/belpy,johnbachman/indra