https://www.ks.uiuc.edu/Research/namd/mailing_list/namd-l.2013-2014/0581.html
namd-l: Re: BAR-estimator error of ParseFEP plugin version 1.5 in VMD 1.9.1
https://www.ks.uiuc.edu/Research/namd/mailing_list/namd-l.2017-2018/1524.html
namd-l: Fwd: parseFEP domain error
namdlfwddomainerror