A zip file cannot be extracted by 7-zip

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luweitest
2014-01-09
2014-01-13
  • luweitest

    luweitest - 2014-01-09

    I encountered a zip file here: http://dl.tigerknows.net/dl/TigerMap-ALL.zip
    When I extract, 7-zip says "unsupported compression method". What's the problem with that file and what should I do to extract it?

     
    • fernando

      fernando - 2014-01-13

      seems not any problem...

      $ md5sum TigerMap-ALL.zip
      5cd1b96759f8e4a47093709c46eba09e *TigerMap-ALL.zip
      
      $ sha1sum TigerMap-ALL.zip
      2ae5d159a89a595da519724bed0fb7a0894100ea *TigerMap-ALL.zip
      
      $ 7z t TigerMap-ALL.zip | find /v "Testing"
      
      7-Zip 9.20  Copyright (c) 1999-2010 Igor Pavlov  2010-11-18
      
      Processing archive: TigerMap-ALL.zip
      
      Everything is Ok
      
      Folders: 34
      Files: 510
      Size:       361849332
      Compressed: 322102296
      
      $ unzip -t TigerMap-ALL.zip | find /v "testing"
      Archive:  TigerMap-ALL.zip
      No errors detected in compressed data of TigerMap-ALL.zip.
      
      $
      
       
  • luweitest

    luweitest - 2014-01-10

    I checked with the latest 7zip alpha and got the same errors. As the file is big (307MB), maybe it's not convenient to download. I opened it with Notepad++, Hex mode, and copied the beginning of the file:

    50 4b 03 04 14 00 00 00 08 00 16 54 98 43 95 4c
    ff 32 3a 05 00 00 93 0f 00 00 16 00 00 00 c0 eb
    cf df b5 d8 cd bc b0 fc ca b9 d3 c3 cb b5 c3 f7
    2e 74 78 74 dd 56 df 4f db 56 14 7e 8f 94 ff 01
    f1 b4 4d 2a a8 6f eb 1e 26 6d d3 b4 a7 69 95 d6
    c7 bd 84 05 41 b6 41 18 d0 a1 fd 39 d7 57 6b 43
    e2 09 3b d8 89 13 c7 09 c4 86 98 24 34 8e e3 3a
    69 36 c4 af 0e 3a b1 b5 6b d0 f8 19 d0 7c 7c 71
    ec 40 07 6c 1d 9a d4 44 8a 74 6f ee bd e7 9c ef
    fb ce 77 af d0 ce fd 86 28 a1 5d cf c0 6f 11 61
    ...

    And the end of the file:
    e9 22 13 7a 68 65 6a 69 61 6e 67 2f 79 75 79 61
    6f 2e 64 61 74 50 4b 01 02 14 03 14 00 00 08 08
    00 53 2c 96 43 48 be 5a 48 33 b3 05 00 01 28 07
    00 15 00 00 00 00 00 00 00 00 00 00 00 b6 81 da
    f8 26 13 7a 68 65 6a 69 61 6e 67 2f 7a 68 6f 75
    73 68 61 6e 2e 64 61 74 50 4b 01 02 14 03 14 00
    00 08 08 00 6c a9 95 43 39 12 5f a6 e8 a9 05 00
    ff 0a 06 00 12 00 00 00 00 00 00 00 00 00 00 00
    b6 81 40 ac 2c 13 7a 68 65 6a 69 61 6e 67 2f 7a
    68 75 6a 69 2e 64 61 74 50 4b 05 06 00 00 00 00
    20 02 20 02 00 8a 00 00 58 56 32 13 00 00

    Please check if there are some clues.

     
  • luweitest

    luweitest - 2014-01-10

    Forgot to mention that only one file in the root directory could be extracted, other files in the sub-directory got "unsupported compression method" error.

     
    Last edit: luweitest 2014-01-10
  • luweitest

    luweitest - 2014-01-13

    I downloaded Winzip 17.5 and got errors too, and seems more specific:

    Extracting anhui\anqing.dat
    Central and local directory mismatch for file "anhui/anqing.dat" (general purpose flags - local: 0 hex central: 800 hex).
    Severe Error: Local and central GPFlags values don't match.

    Does it means that the file has errors itself? Can it be fixed?

     
  • luweitest

    luweitest - 2014-01-13

    I tried WinRAR, and it manages to extract all the files! May the file be created by WinRAR? Anyway, my problem is solved.

     

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