How To Fix QuickBooks Error 6123, 0?

Dealing with QuickBooks errors can be quite frustrating, especially when they disrupt your workflow. One common error that users encounter is QuickBooks Error code 6123, 0. This error can prevent you from accessing your company file and can be caused by various factors. But fear not, as we’re here to guide you through the process of resolving this issue and getting back to business as usual.

QuickBooks Error 6123, 0

Understanding QuickBooks Error Code 6123, 0: Causes and Solutions

QuickBooks Error Code 6123, 0 may arise due to several reasons, including:

  • Corrupt Network Connection – A compromised network connection on the main computer can trigger this error.
  • Firewall Blocking Port – If the firewall network blocks the port required for communication with the server hosting the company file, the QuickBooks error code 6123, 0 can occur.
  • Damaged QBW Files – Corrupt QuickBooks Working (QBW) files, which contain your company data, can lead to this error.
  • Corrupt QuickBooks Data or Program Files – If the QuickBooks data or program files are damaged, the software’s functionality might be impaired, causing this error.
  • Multiple QuickBooks Database Services – Running multiple QuickBooks database services on your system can contribute to the error’s occurrence.
  • Different QuickBooks Versions – Opening the same company file in a new version of QuickBooks might trigger compatibility issues and result in an error.
  • Restoring Backup from External Device – Restoring a backup from a flash drive or removable storage device can introduce QuickBooks Error code 6123, 0.
  • Damaged Windows User – A damaged Windows user profile can impact QuickBooks functionality and lead to this error.

Effective Methods to Resolve QuickBooks Error Code 6123, 0 in Desktop

QuickBooks Desktop users may encounter QuickBooks Error Code 6123, 0 which can disrupt their workflow. This guide presents practical steps to eliminate this error, tailored to different scenarios.

Condition 1: Resolving Error 6123 While Restoring a Backup (.qbb) on a New System:

If you come across this problem while trying to recover a company file from a backup, the following steps could potentially help you resolve the issue.

Process 1: Creating a Portable Company File (.qbm) for Restoration:

Resolving Error 6123 While Restoring a Backup

Step 1: Launch QuickBooks Desktop on the original system used to create the backup file.

Step 2: Open the original company file from which the backup was created.

Step 3: Generate a portable version of the company file by following these steps:

  • Navigate to the “File” menu.
  • Choose “Create Copy.”
  • Opt for “Portable company file” and follow the prompts.
Opt for "Portable company file" and follow the prompts.

Step 4: Shift your focus to the new system and follow these steps:

  • Open QuickBooks Desktop.
  • Restore the backup using the portable copy, not the backup file.

Process 2: Utilizing QuickBooks Auto Data Recovery (ADR):

Utilize QuickBooks Auto Data Recovery (ADR) Tool

Opt for "Portable company file" and follow the prompts.
  • Consider using the QuickBooks Auto Data Recovery tool, which can aid in resolving errors like QuickBooks error code 6123, 0.
  • Restore the ADR copy of the file and assess whether the issue is resolved.

Condition 2: Configuring Multi-User Setup Manually:

Configuring Multi-User Setup Manually

Step 1: Rename .ND and .TLG Files

  • Navigate to the folder containing the company file.
  • Right-click on the .ND file and select “Rename,” adding “.old” to the file name.
  • Repeat the renaming process for the .TLG file.
  • Open the company file using QuickBooks Desktop.
  • Re-scan the company file via QuickBooks Database Server Manager.

Step 2: Set Proper Folder Permissions

Ensure the folder housing the QuickBooks company file on the host system has Full Control permissions.

Set Proper Folder Permissions

Step 3: Relocate the Company File

Test if the error is related to the file path by moving the company file to a different location and opening it from there.

Step 4: Verify Firewall & Antivirus Ports

Verify Firewall & Antivirus Ports

Step 5: Adjust Hosting Settings in QuickBooks

  • Open the company file and switch to single-user mode (File > Switch to single-user mode).
  • Navigate to File > Utilities and select “Stop hosting multi-user access.”
  • Then, choose File > Utilities > “Host multi-user access.”
Verify Firewall & Antivirus Ports
  • Finally, switch back to multi-user mode (File > Switch to multi-user mode).
  • Navigate to the “File” menu and choose “Utilities.” From there, click on “Stop hosting multi-user access.” 
Verify Firewall & Antivirus Ports
  • Additionally, select “File,” then “Utilities,” and choose “Enable multi-user mode.” 
Verify Firewall & Antivirus Ports
  • Finally, to conclude the process, go to the “File” menu and select “Switch to multi-user mode.”
Switch to multi-user mode

Condition 3: Error When Opening or Upgrading Company File:

Process 1: Modify Company File Name and Format:

Error When Opening or Upgrading Company File

Step 1: Review and Adjust Company File Name

  • Ensure the company file name remains within the 30-character limit.
  • Eliminate any special characters or spaces from the file name.

Process 2: Utilize QuickBooks Tool Hub:

Step 1: Install and Launch QuickBooks Tool Hub

  • Close QuickBooks.
  • Download and save the QuickBooks Tool Hub file where you can access it easily.
  • Follow on-screen instructions to install the tool hub.
  • Double-click the tool hub icon on the desktop to launch it.
Error When Opening or Upgrading Company File

Step 2: Utilize QuickBooks File Doctor Tool

Utilize QuickBooks File Doctor Tool
  • Choose “Company File Issues” in the Tool Hub.
  • Click “Run QuickBooks File Doctor” and follow the prompts.
  • Select the company file from the dropdown list.
  • If not found, use the “Browse” option to locate it.
  • Choose “Check your file” and continue.
Utilize QuickBooks File Doctor Tool
  • Enter QuickBooks admin password and proceed.
  • The File Doctor tool will automatically repair the file.
Utilize QuickBooks File Doctor Tool
  • Open the repaired file and ensure to back it up.

Step 3: Execute Quick Fix My Program

  • Select “Program Problems” in the Tool Hub.
  • Choose “Quick Fix My Program” and allow it to run.
Execute Quick Fix My Program
  • This might take a moment, especially with multiple QuickBooks versions.
  • Verify if the issue is resolved by opening QuickBooks.


By adhering to these clear steps, you can effectively address QuickBooks error code 6123, 0 in Desktop when encountering problems while opening or upgrading your company file. Whether it’s adjusting the file name, employing QuickBooks Tool Hub, or using the Quick Fix My Program tool, these solutions are designed to ensure a hassle-free experience in your accounting operations.

You May Read Also : How to Resolve QuickBooks Error H101, H202, H303, and H505?

Frequently Asked Questions

Can this error occur with a single-user setup?

Yes, though it’s more common in multi-user or network setups, this error can still occur in a single-user environment.

Is it necessary to create backups before attempting these solutions?

It’s always a good practice to create backups of your company files before attempting any troubleshooting steps.

What if the QuickBooks File Doctor doesn’t fix the error?

If the QuickBooks File Doctor doesn’t resolve the issue, you might want to consider reaching out to QuickBooks support for more advanced assistance.

Could a damaged Windows user account trigger this error?

Yes, a damaged Windows user account can sometimes lead to this error. Creating a new user account and testing QuickBooks there could help diagnose the issue.

Can I prevent this error in the future?

Regularly updating QuickBooks, maintaining good network health, and using reliable security software can significantly reduce the chances of encountering this error.

What if the error persists even after trying all the solutions mentioned?

If you’ve exhausted the suggested solutions and the error still persists, consider reaching out to the QuickBooks support team. They have specialized tools and expertise to diagnose and resolve complex issues.

Can a damaged company file lead to data loss during troubleshooting?

While troubleshooting steps typically focus on repairing rather than altering the company file, it’s wise to create a backup before attempting any fixes. This precaution ensures your data remains safe during the troubleshooting process.

Are there any compatibility issues with certain versions of QuickBooks and Windows?

Yes, certain combinations of QuickBooks versions and Windows operating systems can have compatibility issues. Refer to Intuit’s official documentation or support resources to ensure you’re using a compatible configuration.

Could a recent Windows update be causing this error?

Yes, sometimes Windows updates can lead to conflicts with certain software, including QuickBooks. If the error occurred after a recent update, consider uninstalling the update or checking for any related patches.

Are there any preventive measures to avoid QuickBooks Error Code 6123, 0 during file sharing?

Absolutely, practicing secure file sharing can help prevent this error. Ensure all users exit the company file before transferring it, maintain consistent network connectivity, and regularly perform maintenance on your network infrastructure to minimize the chances of encountering this error.

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