How To Fix The 80004005 Error
The 80004005 error occurs when you try to use ActiveX Data Objects (ADO) or ODBC to connect to a Microsoft Access database. The error you may receive will look something like this:
“The Microsoft Jet Database Engine cannot open the file ‘(unknown)'”
What Causes The 80004005 Error
There are several causes of the 80004005 error, some of which include:
- The account that Microsoft Internet Information Server (IIS) is using (which is usually IUSR) does not have the correct Windows NT permissions for a file-based database or for the folder that contains the file.
- The file and the data source name are marked as Exclusive.
- Another process or user has the Access database open.
- This error may also occur when you access a local Microsoft Access database that is linked to a table where the table is in an Access database on a network server.
How To Fix The 80004005 Error
Step 1: Check The Permissions On The File
Check the permissions on the file and the folder. Make sure that you have the ability to create and/or destroy any temporary files. Temporary files are usually created in the same folder as the database, but the file may also be created in other folders such as the WINNT folder. For additional information about how to identify which folder does not have the correct permissions and how to configure temporary files, click the following article number to view the article in the Microsoft Knowledge Base:
253604 Microsoft Access 97 database connectivity fails in Active Server Pages
It is important to verify the file and data source because the file has to be in proper working order and must be protected from damage or corrupt.
Step 3 – Close Any Visual InterDev Projects
It is recommended that you close down any other Visual InterDev projects that contain a data connection to the database.
Step 4 – Clean Out The Registry
One of the big causes of 80004005 errors is through the “registry” database of your computer. This is a large database which stores vital information & settings for your PC, and is used continually to help Windows to read the files, settings & options that it needs to run. Although the registry is one of the most important parts of every Windows system, it’s continually causing a large number of problems thanks to the way it will often become corrupted and unreadable. This is the cause behind many 80004005 errors, and needs to be resolved by using a reliable registry cleaner.
This step is best completed by downloading RegAce System Suite, and letting it clean out any of the problems that your system may have inside.
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