unfamiliar with 7zip archive - Help!

[C.Tresenriter]

On Sun, 2015-04-12 at 10:55 +1000, Karl Auer wrote:
> On Sat, 2015-04-11 at 19:33 -0500, C.Tresenriter wrote: *one* file, then
> use 
> > Maybe I'm using the utility incorrectly?
> 
> I seem to recall theat 7zip was/is originally a Windows utility, and
> that a command line version was ported to Linux. I wonder if the sender
> is using Windows and the Windows GUI version has features the Linux CLI
> version is missing.
> 
> If the sender is using Linux/Unix, get him to zip the whole lot into
> *one* file, then use the split utility to chunk it. When you have the
> chunks, just cat them together, and extract from the result.
> 
> Before you do that, though, get him to split a *small* file and test it
> with you.
> 
> Regards, K.

He's a Windows user and just double clicked on the file to open it - a
MAC user did the same.
I've got 7zip on my Win install and it pukes too.

The file isn't all that important, I just thought I was missing
something obvious (again).

Thanks for the replies.