QuickBooks is a popular accounting software used by many small and medium-sized businesses. However, like any software, it can encounter errors from time to time. One such error is QuickBooks Error 80070057. This error occurs when you try to open a company file in QuickBooks, and it indicates that the file is not accessible. In this article, we will discuss what causes this error and provide step-by-step instructions to fix it.

What causes QuickBooks Error 80070057?

There are several reasons why QuickBooks Error 80070057 may occur. Here are some of the most common causes:

1. Firewall settings: The error may occur if your firewall settings are blocking QuickBooks from accessing the company file.

2. Corrupt company file: If your company file is corrupt, you may encounter this error when trying to open it.

3. Incorrect file extension: If the file extension of your company file is incorrect, you may encounter this error.

4. Multiple users trying to access the file: If multiple users are trying to access the same company file at the same time, it may cause the error.

5. Outdated QuickBooks: If you are using an outdated version of QuickBooks, it may not be compatible with the current company file.

How to fix QuickBooks Error 80070057?

Now that we know what causes QuickBooks Error 80070057, let's look at how to fix it. Here are the steps to follow:

Step 1: Update QuickBooks to the latest version

The first step in fixing this error is to update QuickBooks to the latest version. This will ensure that the software is compatible with your company file. Here's how to update QuickBooks:

1. Open QuickBooks and go to the Help menu.

2. Click on Update QuickBooks Desktop.

3. In the Update QuickBooks window, click on the Update Now button.

4. Select the updates you want to download and click on Get Updates.

5. Once the updates are downloaded, restart QuickBooks.

Step 2: Check your firewall settings

If your firewall settings are blocking QuickBooks from accessing the company file, you may encounter this error. Here's how to check your firewall settings:

1. Open your firewall settings.

2. Look for QuickBooks in the list of applications and make sure it is allowed to access the internet.

3. If QuickBooks is not in the list, add it by clicking on the Add button.

4. Restart QuickBooks and try opening the company file again.

Step 3: Rename the .ND and .TLG files

If the .ND and .TLG files of your company file are corrupt, you may encounter this error. Here's how to rename them:

1. Open the folder that contains your company file.

2. Look for the files with the extensions .ND and .TLG.

3. Right-click on each file and select Rename.

4. Add ".old" at the end of the file name (e.g. company_file.qbw.ND.old).

5. Restart QuickBooks and try opening the company file again.

Step 4: Convert the file to a new file

If the above steps did not work, you can try converting the file to a new file. Here's how to do it:

1. Open QuickBooks and go to the File menu.

2. Click on Utilities and then click on Stop Hosting Multi-User Access.

3. Click on Yes when prompted to confirm.

4. Go to the File menu again and click on Create Copy.

5. Select Portable company file and click on Next.

6. Choose the location where you want to save the new file and click on Save.

7. Close the company file and open the newly created file.