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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.

SYMPTOMS

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:

You change the view from All Documents view to Explorer View. Then, you try to create a new subfolder in the document library. However, you receive the following error message:
Unexpected error occurred.
You receive this error message even though you successfully created other subfolders in the document library.
You browse a subfolder in the document library. Then, you try to change the view from All Documents view to Explorer View. The view does not change to Explorer View. Instead, you receive the following error message:
Explorer View requires Internet Explorer 5.0 or greater and Web Folders.

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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.

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WORKAROUND

To work around this behavior, use shorter folder names.

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MORE INFORMATION

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.

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