A blank PCK is an invalid file. Remember, the PCK format is nothing more than a proprietary archive.
It is the same with the ZIP format, you cannot compress zero files. Try again, but this time, don't use
a "blank" PCK. Don't forget the version.sw file either. Include the folders such as login, etc. Any any
rate, you'll probably just end up with needed files that are no longer present. If you ask me, let the
archive span over into the extension, pkx...