This is ACE version 6.5.8, released Mon Feb 10 09:28:37 CET 2020

If you have any problems with or questions about ACE, please send
e-mail to the ACE mailing list (ace-bugs@list.isis.vanderbilt.edu),
using the form found in the file PROBLEM-REPORT-FORM. In order
to post to the list you must subscribe to it.

See http://www.dre.vanderbilt.edu/~schmidt/ACE-mail.html
