Sum fix #576
Sum fix #576

Anaphory/beast2,Anaphory/beast2,tgvaughan/beast2,CompEvol/beast2,Anaphory/beast2,CompEvol/beast2,Anaphory/beast2,CompEvol/beast2,tgvaughan/beast2,CompEvol/beast2,tgvaughan/beast2,tgvaughan/beast2