Comment by Eric Lindblad 10-09-2015 http://www.nurmi-labs.blogspot.com I have sent a copy of Eric J.'s 21 Feb. 2016 dated e-mail [Database left unlocked by Tcl bindings] to a Tcl programmer in the Vancouver area, with whom I have had an exchange of e-mails before. If I receive a timely response I'll post it to the xapian-discuss list.