When teamwork powers your accounting workflow, even a small glitch can bring operations to a halt. One such roadblock is QuickBooks Error Code 6073, a frustrating issue that appears when multiple users attempt to access a company file in multi-user mode.

Resolve QuickBooks Error Code 6073 in minutes with proven steps. Fix multi-user access issues fast or call +1(866)500-0076 for expert guidance.

This error usually means the company file is open on another system in single-user mode, or the file is hosted incorrectly. In simple terms, your network setup is confused — and QuickBooks refuses to cooperate.

But don’t worry. This detailed guide will help you understand the causes, apply quick solutions, and prevent this error from happening again.

What Is QuickBooks Error Code 6073?

QuickBooks Error Code 6073 occurs when QuickBooks Desktop cannot open the company file because it’s already being used in a way that restricts multi-user access.

You may see messages like:

QuickBooks is unable to open this company file.
It may be opened by another user.
Error Code: -6073, -99001

Why Does QuickBooks Error Code 6073 Happen?

Understanding the cause helps you fix the issue faster. Below are the most common triggers:

1. Company File Opened in Single-User Mode

If someone logs in using single-user mode, others cannot access the file.

2. File Located on a Read-Only Network Folder

Incorrect folder permissions block shared access.

3. Hosting Settings Misconfigured

Improper multi-user hosting setup causes access conflicts.

4. Remote Desktop Session Still Active

A user may have closed QuickBooks but left the remote session running.

5. Damaged Network Data (.ND) File

Corrupt configuration files disrupt multi-user communication.

How to Fix QuickBooks Error Code 6073 Quickly

Solution 1: Check Single-User Mode

Ask all users to log out of QuickBooks.
On the host computer, open QuickBooks.
Go to File > Switch to Multi-User Mode.
Try reopening the company file.

If the file opens successfully, the issue is resolved.

Solution 2: Close Remote Desktop Sessions

If a user accessed the file remotely:

Open Task Manager on the server.
Check for active QuickBooks processes.
End any unused sessions.
Restart QuickBooks and try again.

Solution 3: Use QuickBooks File Doctor

QuickBooks Tool Hub includes File Doctor, which automatically detects and repairs network issues.

Steps:

Download and install QuickBooks Tool Hub.
Open Tool Hub.
Select Company File Issues.
Click Run QuickBooks File Doctor.
Scan and repair your file.

Solution 4: Verify Folder Permissions

Locate your company file folder.
Right-click → Properties.
Go to Security Tab.
Ensure all users have:
- Read access
- Write access
- Modify permissions

Apply changes and test the file again.

Solution 5: Rename the .ND File

The Network Data file can become damaged.

Navigate to your company file folder.
Find the file ending in .ND.
Right-click → Rename.
Add .old at the end.
Reopen QuickBooks and scan the folder again.

Solution 6: Check Hosting Settings

On all workstations (except the server):

Open QuickBooks.
Go to File > Utilities.
If you see Stop Hosting Multi-User Access, click it.
Ensure only the server computer hosts the file.

Prevent QuickBooks Error Code 6073 in the Future

Prevention is better than downtime. Follow these best practices:

Always Exit Properly

Ensure users log out instead of simply closing the window.

Avoid Single-User Mode Unless Necessary

Switch back to multi-user mode after administrative tasks.

Maintain Folder Permissions

Review network folder permissions monthly.

Update QuickBooks Regularly

Updates fix known bugs and improve multi-user stability.

Use a Dedicated Server

Hosting the file on a central server reduces conflicts.

Final Thoughts

QuickBooks Error Code 6073 may seem technical, but in most cases, it’s a simple multi-user configuration issue. Whether it’s a single-user lock, network permissions problem, or corrupted configuration file, the fixes are straightforward when applied methodically.

By following the step-by-step solutions above, you can restore file access quickly and keep your accounting workflow running smoothly. Proactive maintenance and correct hosting setup will significantly reduce the chances of this error appearing again.

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