QuickBooks Error 6123: Troubleshooting Steps to Resolve Company File Connection Issues

QuickBooks Error 6123 is a common error that users may encounter when working with QuickBooks company files. This error usually occurs when there are issues with the company file connection, preventing users from opening or accessing the file. It can be frustrating as it hinders productivity and collaboration within the QuickBooks software. In this comprehensive guide, we will provide detailed troubleshooting steps to resolve QuickBooks Error 6123 and restore the connection to your company file.

Before diving into the solutions, let’s briefly understand the possible causes of QuickBooks Error 6123:

Causes of QuickBooks Error 6123:

  1. Network issues: Problems with the network connection, such as an unstable or weak network, can cause Error 6123.
  2. Damaged company file: If the QuickBooks company file itself is damaged or corrupted, it can lead to Error 6123.
  3. Issues with third-party security software: Certain security software or firewall settings can interfere with the connection to the QuickBooks company file and trigger Error 6123.
  4. Incorrect file extension: If the company file has an incorrect file extension or is not recognized by QuickBooks, it can result in Error 6123.

Now, let’s proceed to the troubleshooting steps to resolve QuickBooks Error 6123:

Step 1: Update QuickBooks to the Latest Release

  1. Open QuickBooks and go to the Help menu.
  2. Select “Update QuickBooks” and follow the on-screen instructions to download and install the latest updates.
  3. After the update is complete, restart QuickBooks and try opening the company file again to see if the Error 6123 is resolved.

Step 2: Restart Your Computer and Network Devices

  1. Close QuickBooks and any other programs running on your computer.
  2. Restart your computer and wait for it to fully boot up.
  3. Restart your network devices, such as routers and switches, by unplugging them from the power source, waiting for a few seconds, and then plugging them back in.
  4. Once the devices are back online, open QuickBooks and try accessing the company file to see if the Error 6123 persists.

Step 3: Run the QuickBooks File Doctor Tool

  1. Download and install the QuickBooks File Doctor tool from the official Intuit website.
  2. Run the tool and select the option “Browse” to locate the company file showing Error 6123.
  3. Choose the “Check your file” option and click “Continue.”
  4. Enter your QuickBooks login credentials when prompted.
  5. Select the appropriate option for your situation (e.g., Workstation or Server) and click “Continue.”
  6. The tool will diagnose and repair file-related issues. After the repair process is complete, try opening the company file again to check if the Error 6123 is resolved.

Step 4: Verify and Update Your QuickBooks Database Server Manager

  1. Open the QuickBooks Database Server Manager on the server computer.
  2. Select the “Scan Folders” tab and ensure that the folders containing your company files are listed.
  3. If the folders are not listed, click on “Add Folder” and browse to the location of the company files to add them.
  4. Click “Scan” to start the scanning process. Wait for the scan to complete.
  5. Restart QuickBooks on all workstations and check if the Error 6123 persists.

Step 5: Check File Extension and Rename the Company File

  1. Navigate to the location where your QuickBooks company file is saved.
  2. Right-click on the company file and select “Properties.”
  3. In the General tab, verify that the file extension is “.QBW” (e.g., companyfile.qbw).
  4. If the file extension is incorrect, rename the file and change it to the correct extension (.QBW).
  5. Restart QuickBooks and try opening the renamed company file to see if the Error 6123 is resolved.

Step 6: Temporarily Disable Third-Party Security Software

  1. Temporarily disable any third-party security software, antivirus programs, or firewall settings on your computer.
  2. Try opening the company file in QuickBooks to check if the Error 6123 persists.
  3. If the error is resolved, adjust the security software or firewall settings to allow access to QuickBooks files and folders.

Step 7: Restore a Backup of the Company File

  1. If you have a backup of the company file, restore it to a new location.
  2. Open QuickBooks and navigate to the restored backup file to check if the Error 6123 is resolved.
  3. If the file opens successfully, it indicates that the original company file may be damaged or corrupted.

Step 8: Contact Technical Support If none of the above solutions resolve Error 6123, it is recommended to contact the official QuickBooks technical support team or consult with a certified QuickBooks professional for further assistance.


QuickBooks Error 6123 can be frustrating when it comes to accessing or opening your company file. By following the troubleshooting steps outlined in this guide, you can effectively diagnose and resolve the error. Update QuickBooks to the latest release, restart your computer and network devices, run the QuickBooks File Doctor tool, verify and update the QuickBooks Database Server Manager, check the file extension and rename the company file, temporarily disable third-party security software, restore a backup of the company file, and seek technical support if needed. With these steps, you can overcome QuickBooks Error 6123 and regain access to your company file.

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