Knowledgebase: Error Messages
Error 80004005 "The Microsoft Jet Database Engine Cannot Open the File '(Unknown)'"
Posted by - NA - on 17 September 2005 08:22 PM

Following are possible causes of this error:

1) This error usually occurs when database file or folder that contains the file does not have IUSR Windows NT permission. i.e. you have have uploaded database file other then site's "db" folder.

Please move or upload your database file into "db" folder.

2) Another process or user has the Access database open.

3) Use absolute path in database connection string such as C:\domains\youdomain\db\database-file-name

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