Error 80004005 occurs when the Microsoft Jet Database Engine is unable to open an Access database file. This error can prevent your website or application from accessing required data. It is commonly caused by file permission issues, concurrent access, or incorrect database paths.
Causes
1. Insufficient Permissions:
The database file or the folder containing it may not have the necessary IUSR (Windows NT) permissions. This usually happens if the database file was uploaded outside the website’s designated DB folder.
2. Database File in Use:
Another application or user may have the Access database open, preventing your website from accessing it.
3. Incorrect Database Path:
Using a relative path in your database connection string instead of the absolute path can prevent the database from being accessed correctly.
Below are the steps to resolve the Error
Step 1: Verify File Location and Permissions
Ensure the database file is placed inside the website’s db folder.
Check that the IUSR account (or application pool identity) has read/write permissions on both the file and the folder.
Right-click the folder → Properties → Security → Edit → Add IUSR (if not present) → Allow Read/Write.
Step 2: Close Conflicting Processes
Confirm that no other application or script is using the database file. Close all instances to release access to the file.
Step 3: Use Absolute Path in Connection String
Update your database connection string to use the full path of the database file.
Example: Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\domains\yourdomain\db\database-file-name.mdb;
Avoid relative paths such as ../db/database-file-name.mdb.
Step 4: Test Your Website
After making the changes above, refresh your website or application to confirm that the database connection works without triggering the error.
Conclusion:
Error 80004005 is generally caused by file permission issues, concurrent access, or incorrect database paths. By placing the database file in the correct folder, granting proper permissions, closing conflicting processes, and using an absolute path in your connection string, you can resolve this error and restore proper functionality to your website or application.
