BadZipfile "file is not a zip file"

[webcomm]

On Jan 9, 5:42 am, John Machin <sjmac... at lexicon.net> wrote:
> And here's a little gadget that might help the diagnostic effort; it
> shows the archive size and the position of all the "magic" PKnn
> markers. In a "normal" uncommented archive, EndArchive_pos + 22 ==
> archive_size.

I ran the diagnostic gadget...

archive size is 69888
FileHeader at 0
CentralDir at 43796
EndArchive at 43846