QuickBooks Error 6073 and 99001

🧩 QuickBooks Error 6073 and 99001: Practical Solutions

Error Message:

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

Error Codes: (-6073, -99001)

This error typically occurs in multi-user environments when QuickBooks detects conflicting access to the company file. It prevents users from opening the file and can disrupt accounting workflows.

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⚠️ What Causes Error 6073 and 99001?

• 🔒 The company file is open in Single-User Mode on another computer
• 🗃️ The file is stored in a read-only network folder
• 🧩 The file is hosted on a Linux server with multiple login credentials
• 🌐 Remote access software (e.g., LogMeIn, GoToMyPC) is still active on the host machine
• ❌ QuickBooks fails to release the file lock due to improper shutdown or sync interruption

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🛠️ Step-by-Step Troubleshooting Guide

✅ Step 1: Close the File on Other Systems

Instructions:

1. Ensure the company file is not open on another workstation.
2. If open, close QuickBooks on that machine.
3. Retry opening the file from your computer.

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🔧 Step 2: Switch to Multi-User Mode

Instructions:

1. On the host computer, open QuickBooks.
2. Go to File > Utilities.
3. If you see Host Multi-User Access, click it.
4. On other systems, ensure Stop Hosting Multi-User Access is selected.

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🧹 Step 3: Remove Read-Only Restrictions

Instructions:

1. Navigate to the folder containing the company file.
2. Right-click the folder > Properties.
3. Uncheck Read-only and click Apply.
4. Ensure all users have Full Control permissions.

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🛠️ Step 4: Restart the Host Computer

If remote access software was used, the host may still think the user is logged in.

Instructions:

1. Restart the host computer to release file locks.
2. Retry opening the company file.

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🧰 Step 5: Use QuickBooks File Doctor

Instructions:

1. Download and open QuickBooks Tool Hub.
2. Go to Company File Issues.
3. Run QuickBooks File Doctor.
4. Select your company file and let the scan complete.

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🧠 Pro Tips

• Always back up your company file before making changes.
• Avoid using remote access tools while QuickBooks is open.
• Ensure all users are on the same network domain.
• Keep QuickBooks and Windows updated to the latest release.

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