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Error message when you extract a compressed file that has a .zip file name extension on a Windows Vista-based computer: "This file was compressed using an unknown compression method"
Article ID: 938319 - View products that this article applies to.
When you use WinZip to extract a compressed file that has a .zip file name extension on a Windows Vista-based computer, you receive an error message that resembles the following:
This file was compressed using an unknown compression method. Please visit www.winzip.com/wz54.htm for more information. The compression method used for this file is 98. error: no files were found - nothing to do
This problem occurs if the following conditions are true:
To work around this problem, select the Maximum (portable) compression method in WinZip 10. To do this, follow these steps in WinZip 10:
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about this error message, visit the following WinZip Web site:
http://www.winzip.com/wz54.htmMicrosoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.
The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.
Article ID: 938319 - Last Review: July 11, 2007 - Revision: 1.1