QuickBooks Error H505 – Causes, Solutions, and Expert Help

QuickBooks Error H505 usually appears when a user tries to access a company file that is located on another computer, and QuickBooks can’t reach the server. This multi-user setup error affects collaboration and file sharing.

This article outlines what the error means, its causes, signs to identify it, and proven steps to resolve it. Whether you’re an IT novice or a seasoned pro, you’ll find useful solutions below. If the error persists, expert assistance from Error Code Experts is available.

Watch this quick video to learn the causes and solutions for QuickBooks Error Code H505.

What is QuickBooks Error “H505”?

QuickBooks Error H505 is a multi-user switching error that occurs when the program fails to establish a connection with the host computer where the company file is stored. This error belongs to the H-series errors, which relate to hosting configuration issues in networked environments.

This error typically displays the following message:

“Error Code H505: This company file is on another computer, and QuickBooks needs some help connecting.”

It prevents users from accessing files in a shared network folder, disrupting business operations.

Why does QuickBooks Error “H505” occur?

QuickBooks Error H505 can occur due to several network configuration problems. Here are the common causes:

• Hosting settings are not configured correctly on the server.
• The QuickBooks Database Server Manager is not running.
• The .ND file is damaged or incorrect.
• QuickBooks cannot locate the correct IP address or hostname of the server.
• Required ports (like 8019, 56728, 55378, 55382) are blocked by a firewall.
• The host computer is turned off or unreachable due to network issues.

How can you identify QuickBooks Error “H505”?

You can identify QuickBooks Error H505 using the following indicators:

• The error message appears while trying to open a company file in multi-user mode.
• QuickBooks crashes or freezes on launch or when accessing a shared file.
• The user cannot switch from single-user mode to multi-user mode.
• A message states: “This company file is on another computer and QuickBooks needs help connecting.”
• QuickBooks responds slowly when connected to a network.

What are the steps to fix QuickBooks Error “H505”?

Multiple proven solutions are available to fix this error. Follow the steps below in the suggested order.

Solution 1: Verify Hosting Settings

Improper hosting settings are the most common reason for H505.

1. Open QuickBooks on each workstation.
2. Go to File > Utilities.
3. If you see Stop Hosting Multi-User Access, click it to disable hosting.
4. Only the server should have hosting enabled.

Solution 2: Use QuickBooks File Doctor

QuickBooks File Doctor can automatically detect and fix network errors.

1. Download and install the QuickBooks Tool Hub.
2. Open it and click on Company File Issues.
3. Launch QuickBooks File Doctor.
4. Select the affected company file and choose Check your file and network.
5. Click Continue, enter your admin credentials, and let it finish.

Solution 3: Configure Windows Firewall Settings

If QuickBooks ports are blocked, error H505 may appear.

1. Open Windows Firewall Settings.
2. Go to Inbound Rules > New Rule.
3. Select Port, then click Next.
4. Enter the required ports for your QuickBooks version (e.g., 8019, 56728).
5. Allow the connection, name the rule, and save.
6. Repeat for Outbound Rules.

Solution 4: Edit the Host File

Manually adding the server’s IP and hostname to the Windows host file may help.

1. Open Notepad as an administrator.
2. Go to C:\Windows\System32\Drivers\Etc.
3. Open the hosts file.
4. Add the server’s IP address and computer name.
   • Example: 192.168.1.10 QBServer
5. Save and close the file.

Solution 5: Create a New .ND File

Damaged .ND (Network Descriptor) files may cause access issues.

1. Go to the folder with your company file.
2. Find the file with a .ND extension (e.g., CompanyFile.qbw.nd).
3. Right-click and delete it.
4. Open QuickBooks Database Server Manager and rescan the folder.
5. A new .ND file will be generated automatically.

Is there an automated tool to fix QuickBooks Error “H505”?

Yes. You can use the QuickBooks Tool Hub, which includes the QuickBooks File Doctor utility. This tool detects network setup errors and automatically repairs configuration issues causing H505. It simplifies the process for users without technical knowledge.

How can I prevent QuickBooks Error “H505” in the future?

To avoid this error in the future:

• Enable hosting only on the server.
• Regularly update QuickBooks and Windows.
• Configure firewall and antivirus software to allow QuickBooks processes.
• Ensure QuickBooks Database Server Manager is always running on the server.
• Schedule regular network maintenance to avoid disruptions.

What if QuickBooks Error “H505” is not fixed after troubleshooting?

If you’ve followed all the solutions and the issue remains unresolved, there may be deeper issues with your system, file permissions, or network hardware. It’s essential to avoid extended downtime as it could affect business operations.

How can our experts assist you in resolving QuickBooks Error “H505”?

If you’re still facing QuickBooks Error H505, our experts at Error Code Experts can help you fix it quickly and securely. We provide specialized support to restore your multi-user access and prevent recurrence.

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