If you're trying to open your company file and suddenly see QuickBooks Error 6123, you're not alone. This frustrating issue usually appears with the message: "Error -6123,0: Connection to the QuickBooks company file has been lost." But don’t worry — we’ll walk you through what it means, why it happens, and how to fix it like a pro.

For fast, expert help, call QuickBooks at +1-866-409-5111.

What Is QuickBooks Error 6123?

QuickBooks Error 6123 generally occurs when:

• Opening or restoring a company file (.QBW) from a backup or network
• Upgrading a company file to a newer version of QuickBooks
• The file is stored on a network and the connection is broken

This error blocks access to your critical financial data, but with the right steps, it's fixable.

Common Causes of QuickBooks Error 6123

Understanding the root causes helps you apply the correct fix:

• Damaged company file
• Disrupted network connection
• Firewall or antivirus blocking communication
• Incorrect hosting settings
• Corrupted Windows profile
• Using an outdated QuickBooks version

How to Fix QuickBooks Error 6123