Dragging an e-mail from Thunderbird 52.2.1 fails: only the path to a transient file is stored as a task.
See support request #465 also.
On dragging an email message to Task coach, Thunderbird 52.2.1 passes a filename of the form
c:\users\fred\appdata\local\temp\tmps8yrzm.eml
By observing with "PA File Sight" file activity monitor, this is a file written by Thunderbird at the start of the drag and drop, and then deleted by Thunderbird at the end of the drag and drop (ie when task coach "releases" it).
Task coach only stores the file path for file drops so the e-mail is lost to it.
I've put this as a Task coach bug as it requires a change in task coach to work with new versions of Thunderbird. The cause is a change in the way Thunderbird drops e-mails, which I have also reported as:
https://support.mozilla.org/en-US/questions/1162873
It seems to me that this can be fixed in TaskCoach by reading in the temporary file and processing it in the same way as the mail read from the imap server. However I think it is beyond my python skills.
I have posted a suggested fix with support request #465
I hope Jerome can get to this sometime soon. Thanks for the patch!
(As an aside coming from the non-coder part of the team, if you are possibly interested in helping with other coding work on Task Coach, there's lots of valuable room for improvement, some of which isn't too involved…)