//Reported on the Wikisource mailing list.//
> [2017-08-02 08:00:49] LOG.CRITICAL: Client error: `POST https://commons.wikimedia.org/w/api.php` resulted in a `413 Request Entity Too Large` response: <html> <head><title>413 Request Entity Too Large</title></head> <body bgcolor="white"> <center><h1>413 Request Entity (truncated...) [] []
Happens with quite a few items, e.g.:
> 010OnceAWeek10londuoftBwDec1863ToJun64/log.txt:[2017-08-02 08:00:49] LOG.CRITICAL: Client error: `POST https://commons.wikimedia.org/w/api.php` resulted in a `413 Request Entity Too Large` response: <html> <head><title>413 Request Entity Too Large</title></head> <body bgcolor="white"> <center><h1>413 Request Entity (truncated...) [] []
where the resultant `010OnceAWeek10londuoftBwDec1863ToJun64.djvu` is 279 MB.
The Commons [[ https://commons.wikimedia.org/wiki/Commons:Maximum_file_size | upload limit ]] is 4 GB, but perhaps uploads must be done in multiple parts?