>>Interestingly I found this http://social.msdn.microsoft.com/Forums/eu/visualfoxprogeneral/thread/feeea559-4183-4fed-9081-3879e0d087de
>>where Pavel specifies max command length to be 32767 chars.
>>
>>See also http://www.memecode.com/docs/winzip.html
>
>Thanks, without any doubt, considering the fact that I may have a number of files from one to 40, with long paths, it makes sense to copy the related files I need from that directory, as those are subject to specific filtering, and simply zip the temporary directory. By that, I will avoid having to construct a very big line, which will face a limit at one point or another and make sure that everything that is in the temporary directory is subject to be archived.

Doubts on the bold part ;-)
When I ran into similar trouble with pkzip in the DOS days, I went with the option to create a list file.
Surely writing just the filename into a txt file is better than copying,
as Winzip has a similar option @filename (Dunno if it has problems, as I don't use Winzip if possible)

thomas