Can't extract spanned 7zip files

AluminumHaste

I downloaded NeverWinter Nights 2 Platinum torent (http://thepiratebay.se/torrent/8159156/Neverwinter.Nights.2.Platinum.READ.NFO-BLACKCATS) which is all spanned 7zip archives. When I try to open any of the spanned files, I get crc errors. Also PA shows only a few files in the archive.

It was suggested on the torrent site to use 7zip itself, which I did and that worked fine. It also showed way more files. Here’s some screenshots of the two programs:

PowerArchiver:

7zip:

Using latest version of PA 13.03.02
Showing 7-ZipDLL v9.20 for both PowerArchiver and 7zip

spwolf

did you try using the last file? Or whatever the file that has different size than rest, thats actually the last one?

thanks!

AluminumHaste

I have not tried that, I will later on tonight when I get home from work

AluminumHaste

Okay opened the last file, in this case it’s bkz-mkob.zip.015 and is only 31 MB instead of 262 MB. It does the same thing. PA gives crc errors, 7zip works just fine.

spwolf

ok… it seems to be spanned ZIP, not 7zip, but spanning has not been done following ZIP standard, probably 7zip doing its own thing but we can add support for it.

Mili

Logged in!
Thanks

Mili

this seems to be working in Beta 4, please try and let us know.

Thanks!

AluminumHaste

How do I get the beta?

guido

http://www.powerarchiver.com/download-powerarchiver/

AluminumHaste

Sorry for the late response, but it’s till not working. PA Beta still shows only limited amount of files. Here’s a side by side comparison, 7Zip on the left, PA on the right:

AluminumHaste

Just wondering if you guys are still working on this as it’s still not working.

spwolf

problems… we are trying to figure out what exactly it is doing… it is not spanned zip, but some kind of split zip.

drteeth

Is it appropriate to try to try to fix a problem associated with a Pirate Bay sourced download? I think not.

spwolf

it is 7zip zip spanned archive, so even if you make any kind of similar archive, it will not work…. problem is that it is not a zip multivolume file, but rather split zip just not simply split

AluminumHaste

What I don’t get is that PA is using the same 7zip Dll as 7zip itself, so why does it work differently?

@drteeth, regardless of the source of the files, this is an actual problem that can happen to any archive made this way. I’m not looking for help in extracting copyrighted material (which I have a license for btw from GOG AND amazon, torrents just gave me faster download), I’m reporting a problem I found with PA.

spwolf

@AluminumHaste:

What I don’t get is that PA is using the same 7zip Dll as 7zip itself, so why does it work differently?

@drteeth, regardless of the source of the files, this is an actual problem that can happen to any archive made this way. I’m not looking for help in extracting copyrighted material (which I have a license for btw from GOG AND amazon, torrents just gave me faster download), I’m reporting a problem I found with PA.

these are split ZIP files (by 7zip), not 7zip files… so we dont use 7zip for ZIP, we have our own engine. Problem is that for “splitting” ZIP files, 7zip uses their own logic, not ZIP standard and it is weird, needs more investigation.

AluminumHaste

Ah I see. Well if it’s a non standard way should you even bother trying to support it?

spwolf

@AluminumHaste:

Ah I see. Well if it’s a non standard way should you even bother trying to support it?

a lot of things are non-standard, if we only supported “standards”, it would be a lot easier for us but at the same time, half of our support for formats would be gone :-).

so yeah, we will find a way to support it and You should expect us to

Mili

Should be fixed in RC2;
http://dl.powerarchiver.com/2013/powarc140030int.exe

AluminumHaste

Working perfectly thank you guys. Mark as fixed