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  1. #1
    5 Star Lounger ibe98765's Avatar
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    I have some real old zip files from the mid 1990's that won't open. I've tried using the WinXP native zip support and IZARC. WinXP support says the files (there are multiple ones) are corrupted. IZARC says nothing found in the zip archives. I also tried a freeware zip repair tool but it said no problems found.

    Can anyone recommend a program that can interrogate a zip archive and tel lme if it is corrupted or other detailed data? Or any other ideas?

  2. #2
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    You don't say which zip repair utility you tried. In the (admittedly few) occasions I had problems into corrupt zip files, I've been able to repair them with DiskInternals ZIP Repair.

  3. #3
    Super Moderator BATcher's Avatar
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    [quote name='ibe98765' post='787458' date='04-Aug-2009 10:37'][/quote]
    Have you tried the venerable PKZIP 2.04g, with which they were probably created? I found a download here...
    BATcher

    Time prevents everything happening all at once...

  4. #4
    5 Star Lounger ibe98765's Avatar
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    I tried the diskinternals repair program originally but it didn't find any problems.

    The PKZip DOS version won't run in a command window on my system. Don't know why. When I try to run the program, the cursor advances to the next line and just sits there. Is it waiting for input?

    So I tried the PKZip 2.50 windows 95/98 version (which is most likely what I used to zip these files with). That said "Errors were found in ZIP file, attempt to fix"

    I reply yes. It says it wrote a new repaired file. BUT the file is ZERO bytes in length.

  5. #5
    Super Moderator BATcher's Avatar
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    [quote name='ibe98765' post='787563' date='04-Aug-2009 20:55']The PKZip DOS version won't run in a command window on my system. Don't know why. When I try to run the program, the cursor advances to the next line and just sits there. Is it waiting for input?[/quote]
    I think you need to specify all the required parameters on the command line! It isn't interactive...
    And don't forget you should be uzing PKUNZIP!

    Code:
    PKUNZIP (R)	FAST!	Extract Utility	Version 2.04g  02-01-93
    Copr. 1989-1993 PKWARE Inc. All Rights Reserved. Shareware Version
    PKUNZIP Reg. U.S. Pat. and Tm. Off.
    
    Usage:  PKUNZIP [options] zipfile [@list] [files...]
    
    -c[m]			 extract files to Console [with More]
    -d				restore/create Directory structure stored in .ZIP file
    -e[c|d|e|n|p|r|s] Extract files.  Sort by [CRC | Date | Extension | Name
    				   | Percentage | Reverse | Size]
    -f				Freshen files in destination directory
    -j|J<h,r,s>	   mask|don't mask <Hidden/System/Readonly> files (def.=jhrs)
    -n				extract only Newer files
    -o				Overwrite previously existing files
    -p[a/b][c][#]	 extract to Printer [Asc mode,Bin mode,Com port] [port #]
    -q				Enable ANSI comments
    -s[pwd]		   Decrypt with password [If no pwd is given, prompt for pwd]
    -t				Test .ZIP file integrity
    -v[b][r][m][t]	View .ZIP [Brief][Reverse][More][Technical] sort by [CRC|
      [c,d,e,n,o,p,s] Date|Extension|Name|natural Order(default)|Percentage|Size]
    -x<filespec>	  eXclude file(s) from extraction
    BATcher

    Time prevents everything happening all at once...

  6. #6
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    [quote name='BATcher' post='787607' date='05-Aug-2009 01:12']I think you need to specify all the required parameters on the command line! It isn't interactive...
    And don't forget you should be uzing PKUNZIP!

    Code:
    PKUNZIP (R)	FAST!	Extract Utility	Version 2.04g  02-01-93
       Copr. 1989-1993 PKWARE Inc. All Rights Reserved. Shareware Version
       PKUNZIP Reg. U.S. Pat. and Tm. Off.
       
       Usage:  PKUNZIP [options] zipfile [@list] [files...]
       
       -c[m]			 extract files to Console [with More]
       -d				restore/create Directory structure stored in .ZIP file
       -e[c|d|e|n|p|r|s] Extract files.  Sort by [CRC | Date | Extension | Name
    					  | Percentage | Reverse | Size]
       -f				Freshen files in destination directory
       -j|J<h,r,s>	   mask|don't mask <Hidden/System/Readonly> files (def.=jhrs)
       -n				extract only Newer files
       -o				Overwrite previously existing files
       -p[a/b][c][#]	 extract to Printer [Asc mode,Bin mode,Com port] [port #]
       -q				Enable ANSI comments
       -s[pwd]		   Decrypt with password [If no pwd is given, prompt for pwd]
       -t				Test .ZIP file integrity
       -v[b][r][m][t]	View .ZIP [Brief][Reverse][More][Technical] sort by [CRC|
    	 [c,d,e,n,o,p,s] Date|Extension|Name|natural Order(default)|Percentage|Size]
       -x<filespec>	  eXclude file(s) from extraction
    [/quote]

    That is a mere sixteen years old. I'd suggest that you gamble on something more up-to-date, since so many compression/decompression utilities support multiple compression types and are backward-compatible with virtually all that has gone before, and you can download them as trial software. Try the latest free beta from WinRar, try Stuffit, try WinZip and keep going down the list until you find something. This software can see what is going on inside the file and to extract the contents either whole or in part, or convert it to a different type of file. It may also give a more accurate answer as to whether or not the file is corrupt. It is more powerful at analyzing what is going on than trying to reconstruct what was originally done.

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  8. #7
    5 Star Lounger ibe98765's Avatar
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    I tried WinRAR:

    The Compressed (zipped) Folder is invalid or corrupted.

    So try to repair file. But program is unable to do a repair:

    -------------------------------
    76EM.zip
    Detecting archive type...
    ---> ZIP

    Build rebuilt.76EM.zip
    Done

    ! 76EM.zip: No files repaired


    ----------------------------

    This is the 3rd program that can't repair this file.

    Maybe the problem is that I had set a password on this file? I can't remember if I did. Are there any free programs that remove ZIP passwords so I can try this idea?

    Or is there any app that can look inside a ZIP file and take it apart?

  9. #8
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    [quote name='ibe98765' post='787691' date='05-Aug-2009 16:06']I tried WinRAR:

    The Compressed (zipped) Folder is invalid or corrupted.

    So try to repair file. But program is unable to do a repair:

    -------------------------------
    76EM.zip
    Detecting archive type...
    ---> ZIP

    Build rebuilt.76EM.zip
    Done

    ! 76EM.zip: No files repaired


    ----------------------------

    This is the 3rd program that can't repair this file.

    Maybe the problem is that I had set a password on this file? I can't remember if I did. Are there any free programs that remove ZIP passwords so I can try this idea?

    Or is there any app that can look inside a ZIP file and take it apart?[/quote]

    I just googled 'zip repair' and gave up after well over 200 hits. I suggest a more refined search than that, preferably with a source that has recommendations, but you are only at the third program and there are literally hundreds at you fingertips that claim, rightly or wrongly, to be able to cure what ails you. You do need to do some research, but my own first instinct would be to head for the latest and smartest that offer a free trial. and see what they can do for you. If you find one that starts cracking the code for you, then you might be inclined to buy it (which is the advantage to the seller of offering a free trial), and you can report your findings to us in The Lounge (which is the multiplier effect, whereby we all give it a shot). You are the Experimenter, and three is a paltry sample size from hundreds of programs all claiming to do the same thing.

    I'll see if I can think of any I have personally used, but the only one I can think of at the moment that is a little off the beaten track for PC users (I think it was historically Mac) is Stuffit, and I'm not even sure if they offer a free trial. That is a full-featured compression/decompression program, not a recovery utility as such, but it covers territory that others might miss. I thought there was a PC Doctor program for what you want, but I can't seem to find it at present.

    Research means that YOU do the work, and then report your findings. That is not intended to be as cruel as it sounds, for we will help you all we can, but there are limits.

  10. #9
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    [quote name='ibe98765' post='787691' date='05-Aug-2009 16:06']Maybe the problem is that I had set a password on this file? I can't remember if I did. Are there any free programs that remove ZIP passwords so I can try this idea?[/quote]
    Yes, there are password removers/crackers out there, but I haven't found one that works in a reasonable amount of time, if at all. If you realize how many combinations are possible given letters, numbers, case, type, number of characters, etc., even the best of them have to go through the same routine, i.e., try each possible combination.
    Jeff
    simul iustus et peccator

  11. #10
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    [quote name='ibe98765' post='787691' date='05-Aug-2009 15:06']This is the 3rd program that can't repair this file.

    Maybe the problem is that I had set a password on this file? I can't remember if I did. Are there any free programs that remove ZIP passwords so I can try this idea?

    Or is there any app that can look inside a ZIP file and take it apart?[/quote]

    Did you try the DOS PKunzip?

    Where are these files located (i.e. internal hd, external hd, floppy)?

    Joe
    Joe

  12. #11
    Uranium Lounger
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    If the files were password protected you would be asked for the password when you first attempt to open the file. You didn't indicate that this was going on, so I doubt they are password protected.
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  13. #12
    Uranium Lounger
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    Repair programs for .zip file from here

    * DataNumen's Advanced Zip Repair - http://www.repair-zip-files.com/ $29.95

    * DiskInternals ZIP Repair - http://diskinternals.com/zip-repair/ FREE Trial fully functional

    * ZipRepair - http://www.ziprepair.com/ $29.95
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  14. #13
    Uranium Lounger
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    One more....

    Kernel Zip Recovery http://www.zipfilerecovery.com/ fully functional evaluation version (Saving Option DISABLED) $29 to buy
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