Removed version from parameter in get xml_file_name as version is not yet set on the file by that time and added a clearer error message when some data retrieve is none
Removed version from parameter in get xml_file_name as version is not yet set on the file by that time and added a clearer error message when some data retrieve is none

+ avoiding concatenation error.

gnott/elife-bot,gnott/elife-bot,jhroot/elife-bot,jhroot/elife-bot,gnott/elife-bot,jhroot/elife-bot