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Monday, December 26, 2011

How to use command line add-on to repair invalid zip files

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Zipped file make it much easier to send and receive large files through e-mails. With the use of compressed files format (like .zip) we can convert large files into small files that can be sending via e-mail. But these zip file may get corrupt due to several reason like virus attack, at the time of attachment with slow Internet; improper downloading of zipped files etc. In the file zip corruption situation you cannot access your data which is present inside zipped file. In that case you need to use some repair method or use zip recovery software to repair corrupt zipped file.

WinZip offers several methods to repair corrupt .zip or .zipx files depend of corruption cases. Invalid zip file corruption case can be handled by WinZip Command Line Support Add-On. But this command line support add-on not support of all version of WinZip it works for WinZip 10.0 and later versions. Depends on your version of WinZip you can download appropriate version of command line support add-on from here.

Follow the steps written below to use command line support add on...

  1. Click Start, click All Programs, and click Accessories
  2. Right click Command Prompt and choose Run as administrator
    (Windows XP: Left click Command Prompt)
  3. Change directories to the folder where the corrupted Zip file is located.
  4. Type: "C:\Program Files\WinZip\wzzip" -yf zipfile.zip
You can use below written command if zip file is split or spanned

"C:\Program Files\WinZip\wzzip" -yfs zipfile.zip

WZZIP will create a new Zip file with a fixed suffix in the file name. The original Zip file will not be modified. Only the data in the original Zip file is used. I am sure that above method will fix your Invalid zip file problem. For any reason if above method didn't work for you then use some zip recovery software which is compatible with your system configuration to solve the problem.
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