Fix QuickBooks Error 6073, 99001 -Unable to Open the Company File

Learn all the methods to fix QuickBooks Error Code 6073

QuickBooks Error Code 6073 is a commonly found error which occurs when a user strives to access the company file (.qbw) in multi-user mode.

In simple words, this means that when a user tries to open a file that another user has already opened, the new user will not be able to access the company file.

In this blog, we will discuss in detail the QuickBooks Error Code 6073 99001, and learn how to fix the error. It will help the user in safeguarding their company-related data. Call Us Now For Quick Solutions

What is QuickBooks error 6073 99001?

QuickBooks Error 6073 occurs when users try to access the company file in multi-user mode. The user may see this error message on the screen:

QuickBooks is unable to open this company file. It may have been opened by another user.

Error codes: (-6073, -99001)

Read Also: QuickBooks Error 6129

Reasons :Why does QuickBooks Error Code 6073 occur?

QuickBooks Error Code 6073 99001 can occur because of various reasons. Some of the common reasons are:

• The company file is open on another system in single-user mode.
• The company file is placed in a read-only folder.
• The user is accessing the document through a remote OS, hence the host system shows that the user is still logged in.
• Linux server is hosting the files, and multiple credentials are being used to log in to the single shared folder.

Ways to fix QuickBooks error 6073 99001: Solutions

Errors occupy a lot of time, and you may lose your data due to such errors. Hence, follow a few easy steps to fix QuickBooks Error 6073. There are various situations where you may encounter the error. Hence, you should follow these methods to resolve the error. Call Us Now For Quick Solutions

Method 1: Use QuickBooks File Doctor Tool to fix QuickBooks Error Code 6073

To resolve QuickBooks error 6073 99001 with the file doctor tool, follow these steps:

 1: Firstly, visit the Intuit website and download the latest version of QuickBooks Tool Hub.

Step 2: After you download and install the tool, open the QB Tool hub icon saved on your desktop.

Step 3: Go to the company file issues tab, and click the QuickBooks file doctor tab.

Step 4: Once it has completed its task, close the window, and restart the app to see if the error has resolved.

Read Also: QuickBooks Error 1920

Method 2: Solve manually QuickBooks error 6073, 99001

The manual way to fix QuickBooks Error 6073 depends upon different conditions. Hence, we have provided solutions as per different situations:

Case 1: When the company file in single-user mode opens on another system

Step 1: Firstly, close the QuickBooks desktop on all the systems.

Step 2: Then open the company file on the host computer.

Step 3: From the file menu, select the option of a switch to multi-user mode.

Step 4: If you encounter the same error, reboot all the systems.

Case 2: When the company file on the host computer opens in Single-User mode

Step 1:From the file menu, select “close the company.”

Step 2: Open the company file again.

Step 3: Go to the File menu again and select “Open or Restore Company“.

Step 4: Click Next after opening the company file.

Step 5: Select the company file.

Step 6: Go to the multi-user mode and then open it.

Case 3: When the company file is located in a folder with a “read-only” setting

Since the file is located on the read-only folder, the user has to remove the setting.

Step 1: Go to the host computer.

Step 2: Open the folder in which your company file is saved.

Step 3: Right-click on the folder to select “Properties.”

Step 4: Click on the “Security tab” to select the user and click “Edit.“

Step 5: Click on the tab “Allow” and then on Apply; after that at last select “Ok.”

Case 4: When the system is accessed remotely from LogMeIn, GoToMyPC, and other such options

Step 1: Go to the Taskbar and right-click select “Task Manager.”

Step 2: Choose processes and look for running operations under the user’s name.

Step 3: Restart the system in case processes are running under that user’s name.

Read Also: QuickBooks Error 15241

Method 3: Working on Network Data File

Network Data files have .ND extension. These files allow QuickBooks to access the company files available on a network.

Step 1: Go to –> Start. Open the Windows Explorer.

Step 2: Look for the folder under the QuickBooks that has the company file.

Step 3: Right-click the Company file with network data and QuickBooks company file extension(.QBW). Modify the .old file extension.

Step 4: Open QuickBooks

Step 5: Open the company file.

Step 6: Lastly, make another.ND file for the company file.

Method 4: The transaction log files and network data files are marked hidden

Step 1: Go to “My Computer” select the Tools menu and click on the option “Folder.”

Step 2: Select the “View” tab and click on the “Show hidden files & folders” tab.

Step 3: Then open the data folder to check the transaction log files and network data files.

Step 4: Go on the network data file and right-click to select “properties” options.

Step 5: Delete the “Hidden” option and select “Ok.”

Method 5: Maintain Favorable Firewall and Antivirus Settings

Step 1: QuickBooks Port Configuration Guide

Each QuickBooks version uses specific ports for communication:  

• QuickBooks Desktop 2019 and later: 8019, XXXXX  
• QuickBooks Desktop 2018:8019, 56728, 55378-55382  
• QuickBooks Desktop 2017: 8019, 56727, 55373-55377  
• QuickBooks Desktop 2016:8019, 56726, 55368-55372  

Step 2: Access Windows Firewall Settings

1. Click the Start button and search for “Firewall.”  
2. Select “Windows Defender Firewall.”  

Step 3: Create Firewall Rules

1. Click Advanced settings  
2. Select Inbound Rules > New Rule.  
3. Choose Port, click Next, then select TCP.  
4. Enter the required QuickBooks ports and click Next.  
5. Select Allow the connection, then choose profiles (Domain, Private, Public).  
6. Name the rule (e.g., “QuickBooks ports”) and click Finish.  
7. Repeat to create an Outbound Rule.  

Step 4: Test QuickBooks  

Open QuickBooks and try to access your company file in multi-user mode to check for issues.  

Step 5: Configure Router/Third-Party Firewall

If applicable, follow your device’s documentation to allow QuickBooks port traffic.  

Step 6: Verify Multi-User Setup

In QuickBooks, go to File> Utilities and ensure Host Multi-User Access is enabled.  

Step 7: Regularly Update Rules

Periodically review your firewall rules, especially after network changes or QuickBooks upgrades.  

Method 6: Repair the QuickBooks Desktop Through CP

Step 1: Open the Control Panel.

Step 2: Click on “Programs and Features.”

Step 3: Select “Uninstall/Repair a Program.”

Step 4: Scroll through the list of installed applications.

Step 5: Choose “QuickBooks Desktop.”

Step 6: Right-click on it and select “Repair.”

Step 7: Allow the repair process to begin.

Step 8:  Wait until the program is fully repaired.

Step 9: Restart your device.

Step 10: Open QuickBooks again.

Step 11: Unlock your company file. 

Conclusion

QuickBooks Error 6073 can interrupt access to your company file but can often be resolved by adjusting file permissions, ensuring proper file hosting, and troubleshooting multi-user mode. To fix the error, run the QuickBooks File Doctor, verify the file’s location, and make sure only one user accesses the file at a time. 

Disclaimer: The information outlined above for “Fix QuickBooks Error 6073, 99001 -Unable to Open the Company File” is applicable to all supported versions, including QuickBooks Desktop Pro, Premier, Accountant, and Enterprise. It is designed to work with operating systems such as Windows 7, 10, and 11, as well as macOS.