<h1>How to Resolve QuickBooks Error -6073, -99001 Quickly Safely (2026 Guide)</h1>
<h2>Introduction</h2>
<p>
<strong>QuickBooks Error -6073, -99001</strong>
is a common issue that prevents users from opening their company file. This error usually occurs when the file is
already in use, damaged, or stored on a network incorrectly. If not resolved quickly, it can disrupt accounting tasks
and cause data access issues.
</p>
<p>
Fix QuickBooks Error -6073, -99001 by closing multi-user mode, updating QuickBooks, and calling [phone] for
expert help.
</p>
<h2>What Causes QuickBooks Error -6073, -99001?</h2>
<p>Understanding the root cause helps prevent future errors. Common reasons include:</p>
<ul>
<li>
<p>
Company file opened in
<strong>multi-user mode on another system</strong>
</p>
</li>
<li>
<p>Incorrect network hosting settings</p>
</li>
<li>
<p>File corruption or damage</p>
</li>
<li>
<p>Antivirus or firewall blocking QuickBooks</p>
</li>
<li>
<p>Hosting enabled on multiple computers</p>
</li>
<li>
<p>QuickBooks not updated to the latest version</p>
</li>
</ul>
<h2>Symptoms of QuickBooks Error -6073, -99001</h2>
<p>You may experience the following signs:</p>
<ul>
<li>
<p>QuickBooks crashes when opening the company file</p>
</li>
<li>
<p>Error message “Error -6073, -99001” appears</p>
</li>
<li>
<p>Unable to access the company file</p>
</li>
<li>
<p>QuickBooks freezes or runs slowly</p>
</li>
</ul>
<p>
If these symptoms persist, call
<strong>[phone]</strong>
for immediate technical support.
</p>
<h2>How to Fix QuickBooks Error -6073, -99001 Quickly</h2>
<p>Follow these step-by-step solutions to resolve the issue safely.</p>
<h3><strong>Solution 1: Close Multi-User Mode</strong></h3>
<ol>
<li>
<p>Ask all users to log out of QuickBooks</p>
</li>
<li>
<p>Open QuickBooks as Admin</p>
</li>
<li>
<p>
Go to
<strong>File → Switch to Single-User Mode</strong>
</p>
</li>
<li>
<p>Try opening the company file again</p>
</li>
</ol>
<p>This resolves conflicts caused by multiple users accessing the file.</p>
<h3><strong>Solution 2: Check Hosting Settings</strong></h3>
<p>Incorrect hosting settings can trigger this error.</p>
<p><strong>Steps:</strong></p>
<ol>
<li>
<p>Open QuickBooks on all systems</p>
</li>
<li>
<p>
Go to
<strong>File → Utilities</strong>
</p>
</li>
<li>
<p>
Select
<strong>Stop Hosting Multi-User Access</strong>
(if enabled)
</p>
</li>
<li>
<p>Only the server should have hosting enabled</p>
</li>
</ol>
<h3><strong>Solution 3: Update QuickBooks to the Latest Version</strong></h3>
<p>Outdated software often causes file access errors.</p>
<p><strong>Steps:</strong></p>
<ol>
<li>
<p>Open QuickBooks</p>
</li>
<li>
<p>
Go to
<strong>Help → Update QuickBooks Desktop</strong>
</p>
</li>
<li>
<p>
Click
<strong>Update Now</strong>
</p>
</li>
<li>
<p>Restart QuickBooks</p>
</li>
</ol>
<p>
If the error continues, contact
<strong>[phone]</strong>
for advanced troubleshooting.
</p>
<h3><strong>Solution 4: Use QuickBooks File Doctor Tool</strong></h3>
<p>QuickBooks Tool Hub includes File Doctor to fix damaged files.</p>
<p><strong>Steps:</strong></p>
<ol>
<li>
<p>Download QuickBooks Tool Hub</p>
</li>
<li>
<p>Open Tool Hub → Company File Issues</p>
</li>
<li>
<p>
Run
<strong>QuickBooks File Doctor</strong>
</p>
</li>
<li>
<p>Browse and repair the company file</p>
</li>
</ol>
<p>This tool fixes corruption and network errors automatically.</p>
<h3><strong>Solution 5: Check Antivirus and Firewall Settings</strong></h3>
<p>Security software may block QuickBooks.</p>
<p><strong>Steps:</strong></p>
<ul>
<li>
<p>Add QuickBooks to antivirus exceptions</p>
</li>
<li>
<p>Allow QuickBooks ports in firewall</p>
</li>
<li>
<p>Temporarily disable antivirus to test</p>
</li>
</ul>
<p>
If unsure, get professional guidance from
<strong>[phone]</strong>
.
</p>
<h3><strong>Solution 6: Copy the Company File to Local Desktop</strong></h3>
<p>If the file is on a network drive:</p>
<ol>
<li>
<p>Copy the company file (.QBW) to your desktop</p>
</li>
<li>
<p>Open QuickBooks</p>
</li>
<li>
<p>Open the copied file locally</p>
</li>
</ol>
<p>If it opens successfully, the issue is network-related.</p>
<h2>Preventive Tips to Avoid QuickBooks Error -6073, -99001</h2>
<p>To avoid this error in the future:</p>
<ul>
<li>
<p>Always update QuickBooks regularly</p>
</li>
<li>
<p>Avoid opening company files over unstable networks</p>
</li>
<li>
<p>Ensure only the server hosts multi-user mode</p>
</li>
<li>
<p>Use QuickBooks Tool Hub regularly</p>
</li>
<li>
<p>Maintain regular company file backups</p>
</li>
</ul>
<h2>Final Thoughts</h2>
<p>
<strong>QuickBooks Error -6073, -99001</strong>
can be frustrating, but it is fixable with the right troubleshooting steps. Following the solutions above will help
you resolve the issue quickly and safely. For advanced support, network troubleshooting, and company file repair,
contact QuickBooks experts at
<strong>[phone]</strong>
.
</p>
<h2>Frequently Asked Questions (FAQ)</h2>
<h3><strong>What is QuickBooks Error -6073, -99001?</strong></h3>
<p>It is a file access error that occurs when QuickBooks cannot open a company file due to network or file issues.</p>
<h3><strong>Can I fix QuickBooks Error -6073, -99001 myself?</strong></h3>
<p>
Yes, using File Doctor, updating QuickBooks, and checking hosting settings can fix it. For complex issues, call
<strong>[phone]</strong>
.
</p>
<h3><strong>Is this error related to file corruption?</strong></h3>
<p>Yes, corrupted company files are a major cause of this error.</p>