As a follow-up, I may have found the one commit for fixing the "'origin' must be supplied" issue (from reading the upstream NEWS [1] backwards landing at #4428 [2]
Dirk [1] https://rdatatable.gitlab.io/data.table/news/index.html [2] https://github.com/Rdatatable/data.table/pull/4428 -- http://dirk.eddelbuettel.com | @eddelbuettel | e...@debian.org
