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Error message when you use Explorer View in a document library in Windows SharePoint Services 3.0: "Unexpected error occurred" or "Explorer View requires Internet Explorer 5.0 or greater and Web Folders"
Article ID: 923174 - View products that this article applies to.
You experience one or more of the following symptoms when you work in a document library in a Microsoft Windows SharePoint Services 3.0 Web site:
The "Explorer View requires Internet Explorer 5.0 or greater and Web Folders" error message has several different causes. One cause of the error messages that are mentioned in the "Symptoms" section is that the URL that represents the path of the folder contains more than 260 characters. The maximum length of a URL in Windows SharePoint Services 3.0 is 260 characters.
URLs in Windows SharePoint Services 3.0 must have a site relative path of 260 characters or less.
Note A site relative path includes everything that follows the site root in the path.
Additionally, you cannot have any single file name or folder name that is more than 128 characters in a URL.
Article ID: 923174 - Last Review: April 1, 2011 - Revision: 3.0