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7 zip error issue when trying to open sega dreamcast games and so on


Brendon

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Hey my name is Brendon,and i been having some trouble with downloading any CD roms such as sega cd,sega saturn,and gamecube games. All the cartridge based games download and play fine but when i want to do the cd games in launchbox it will say 7-zip error and wont let me do anything. How can i fix this? this is only problem i have run into.

 

Thanks

Brendon

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Hi Brendon,

Can you open and unzip any of the CD rom zip files with 7-zip, outside of LaunchBox? If you have 7-zip installed, right-click on the CD rom zip file in File Explorer and select Test archive:

image.thumb.png.f4e0a358adeb1dd2db494576697f0ed9.png

If the test passes ok, does the emulator have the Extract ROM archives before running option checked (under Tools -> Manage -> Emulators, then double-click the emulator)? I assume it has, otherwise 7-zip wouldn't be called, but it's worth checking.

image.thumb.png.e4d5222b36b52ca2c979d4396e0b7f23.png

To see why 7-zip is throwing an error, first enable LaunchBox's debug logging (under Tools -> Options -> General -> Debugging).

image.thumb.png.3bafc56a31e8525569a05b6cbe114a29.png

After enabling it, close and open LaunchBox, then try run one of the CD based games to generate the 7-zip error. Once you see the error, open File Explorer and navigate to <LaunchBox>\Logs and find the latest log file. Open it and search for SevenZip.Extract Log. You might see something like this listed below that line.

2022-03-28 01:43:34 PM SevenZip.Extract Log: 
7-Zip 21.07 (x64) : Copyright (c) 1999-2021 Igor Pavlov : 2021-12-26

Scanning the drive for archives:
0M Scan D:\Emulation\ROMs\Sony - PlayStation\

1 file, 84175728 bytes (81 MiB)

Extracting archive: D:\Emulation\ROMs\Sony - PlayStation\Doom (USA).zip
9% Open
ERROR: D:\Emulation\ROMs\Sony - PlayStation\Doom (USA).zip
D:\Emulation\ROMs\Sony - PlayStation\Doom (USA).zip
Open ERROR: Cannot open the file as [zip] archive


ERRORS:
Is not archive

9%


Can't open as archive: 1
Files: 0
Size:       0
Compressed: 0

That should give you a hint as to what has happened. Please post the log file here if you need some help parsing the log.

Are you using any launchers or other plugins, or is a pretty vanilla LaunchBox / RetroArch setup?

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