Crack the Error 3045: Fixing Access ‘Could Not Use File Already in Use’ in Seconds!

The error “could not use file already in use” occurs when trying to open or modify the Access database file that is stored over the server. This error simply means that the file is already in use by another user. Although this warning message often left users scratching their heads, wondering how to troubleshoot this annoying roadblock.

could not use file already in use

Thus, if you are one such user, don’t fret. In this blog, we will delve into the roots of runtime error 3045 file already in use, effective workarounds, and precautionary tips to ensure a continuous database experience.

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Quick Fixes:

What Is Error Code 3045 File Already in Use?

This cryptic message occurs if another user has opened the same database file exclusively & you try to open it at the same time. When this error appears, you cannot open or even modify the database file that is located in the DB server.

However, various causes could contribute to this error. So, before addressing it, let’s identify the root cause:

  1. Attempting to modify the Access db file that is already opened
  2. Due to a corrupted database
  3. Access the database from an untrusted location or path
  4. Insufficient permission to access the file
  5. Conflicting third-party applications
  6. Corrupt or missing lock files
  7. Running an outdated version of Access.

Should I Fix Microsoft Access File Already in Use Error Promptly?

Yes, it is vital to fix the Microsoft Access file already in use error immediately. Ignoring the error can lead to data integrity or severe data loss. But before solving this perplexing message using the methods mentioned below in this blog, it is advisable to back up your database file & its object to avoid a data loss scenario.

Methods to Solve “Could Not Use File Already in Use” Error in Access

Let’s try the below-discussed solutions to rectify the situation.

Fix 1- Close the Opened Access Databases

If you have opened multiple database files in the same instance, you may be getting this error due to this reason. Consider closing all the database files to escape the problem.

Follow the below steps to do so:

  • Place your mouse pointer on the Taskbar over the Access icon >> right-click on it.
  • Then, click on the “Close all Windows.”

Close all Windows

Also Read: Fix Microsoft Access Object Already Exists Error 3012

Fix 2- Check for the Latest Software Update

Using an outdated version of Access software often triggers various unexpected issues including runtime error 3045 file already in use. To overcome such a situation, it is vital to install the latest Access update and resume your work.

Fix 3- Open the File in Shared Mode

This error also arises when you try to open a database file in Exclusive mode. To fix this, you just need to simply open the file in shared mode. Below here are the complete steps that you should do, and it will surely fix your problem.

  • Go the File >> Options >> Client Settings.
  • Under Advanced section >> change the default open mode from Exclusive to Share.

Open the File in Shared Mode

OpenDatabase Function

If in case you are opening MS Access DB file from another MS access file using OpenDatabase function, then apply the below code to get away from this error. This is also related to open mode.

Set gblWS = DBEngine.Workspaces(0)

Set gblExtDB = gblWS.OpenDatabase(“[file name]”, False, False)

Here the first parameter is a string of path and file name of your DB file. Whereas, the second parameter is the key to solving this problem. It is the open mode; where false is Shared Mode and true is Exclusive Mode.

The last parameter is the read-only option. So set this to false and you can write to the DB file.

Fix 4- Reboot the Server

If you are using an MS Access-based DB then in some cases the access-based gets locked by the Windows user accessing the shared file. You can restart the server to fix this, or if in case of a server restart won’t work then you can find out which Windows user is accessing the shared drive and restart the client machine that is accessing the file. After then start the database, now you will be able to use it.

Fix 5- Get the Required Permissions

Lack of sufficient permissions to modify the file is another major factor for Microsoft Access file already in use error. So, ensure you have sufficient read & write permissions over the stored database. Follow the below steps to check & get the necessary permissions:

  • Navigate to the folder where you have stored the database file >> right-click on that folder >> choose Properties.

could not use file already in use

  • After this, click on Security Tab then Advanced.

could not use file already in use

  • Under the opened window, choose Change Permissions >> Administrators > Edit.

Change Permissions

  • Now, you have to change the option “Apply to drop-down” to “This Folder, Subfolder, and Files.”
  • Finally, choose Full Control>> OK > Apply.

Also Read: Solving Item Cannot Be Found in The Collection Corresponding (Error 3265)

Fix 6- Check the Location of the File

An unreliable or incorrect path of the database .mdb or .accdb file can also lead to this error message. Ensure you are opening the file from the standard UNC path.

To check the default database path, follow the below steps:

  • Open Access.
  • Then, click on File menu >> Options.
  • Under Access Options, you can check the DB file path next to the option “Default database folder.”

Default database folder

Fix 7-Repair Corrupt Database File to Fix Access ‘Could Not Use File Already in Use’ 

Sometimes, corruption in the Access database file can trigger numerous errors including runtime error 3045. In such cases, using a built-in Access utility “Compact and Repair” can assist in repairing the damaged database file.

Follow the below steps to run this tool:

  • Open Access application.
  • Then, go to the Templates page >> click Blank Database.
  • Select File>> Close.
  • After that, navigate to the Database Tools >> click on the Compact and Repair Database.

Compact & Repair Database

  • Choose the affected file under Database to Compact From window >> click on Compact option.

Compact and Repair Database

  • Finally, you will get a compacted & repaired db file at the exact location where you stored the original file.

In case, the Compact & Repair tool doesn’t work, then use the recommended Access Database Repair Tool which is specifically designed to troubleshoot any type of corruption issue that occurs in the Access Database.

* By clicking the Download button above and installing Stellar Repair for Access (14.8 MB), I acknowledge that I have read and agree to the End User License Agreement and Privacy Policy of this site.

Steps To Use MS Access Repair and Recovery Tool

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Prevention Tips to Avoid This Error

You can acquire some effective precautionary measures to avoid this error in the future:

  1. Regularly back up your Access database.
  2. Keep your Access software up-to-date.
  3. Ensure to inform other users of the group when you are working on the shared network file.
  4. Make sure to close unnecessary database files.
  5. Compact and Repair your database regularly to avoid corruption issues.

Related FAQs:

Can This Error Lead to Permanent Data Loss?

Yes, if this error message is not solved promptly, it can lead to permanent data loss.

Why Is Access Database Opening Read Only?

The Access database opens read-only when someone else has opened the file in exclusive mode.

How Can You Open an Already Saved Database in MS Access?

You can open an already saved database in MS Access from Windows File Explorer. Navigate to the folder that contains the database file you need to open & double-click on it.

What Should I Do If the Error Persists Despite Troubleshooting?

If the error persists after applying the troubleshooting tips mentioned here, you should immediately seek for professional help.

Also Read: Access Database Unexpected Error 35012: What You Need to Know!

Conclusion

Solving the Access error could not use file already in use requires an efficient solution. In this blog, we have covered the key points to reinforce your understanding and fix this error effectively. All you need to do is apply the solutions according to your niche and with the proper guidelines specified here.

Good luck!

References:

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  1. Download Stellar Repair for Access rated Great on Cnet (download starts on this page).
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Pearson Willey is a website content writer and long-form content planner. Besides this, he is also an avid reader. Thus he knows very well how to write an engaging content for readers. Writing is like a growing edge for him. He loves exploring his knowledge on MS Access & sharing tech blogs.