Congratulations on multivolume support, Finally!
Eventually superior sevenzip LZMA compression should make WinRAR/Rar obsolete. But providing it can do things better. The new header encryption:
is GREAT and compares to the WinRAR simpler syntax:
BUT the current 7z Multivolume naming scheme IMHO is behind:
Why not use the MUCH used and accepted WinRAR syntax, and BEAT WinRAR at its own game ??
Example: current 7-Zip 4.14 beta
Example: current WinRAR 3.42 (not old *.r?? scheme)
Archive.part01.rar ... Archive.part99.rar
Archive.part001.rar ... Archive.part999.rar
Archive.part0001.rar ... Archive.part9999.rar
So why not simply use the same syntax for *.7z (or SFX) in the next 7-Zip ?
Archive.part1.7z ... Archive.part9.7z (for 1-9 volumes)
Archive.part01.7z ... Archive.part99.7z (for 1-99 volumes)
Archive.part001.7z ... Archive.part999.7z (for 1-999 volumes)
Archive.part0001.7z ... Archive.part999.7z (for 1-9999 volumes)
Surely it wouldn't be too hard to do this?
To COUNT volumes created and rename (if necessary) to add those extra zeros in ".part(0)(0)..x" names so that they LIST in proper sequential order in most file managers.
i.e. to avoid the following happening for example:
The long standing, simple and proven solution (as WinRAR uses) is the syntax:
Best regards and sincere thanks for LZMA Compression!