Troubleshooting Guide: QuickBooks Connection Has Been Lost
                     Follow These Methods If QuickBooks Connection Has 
Been Lost
QuickBooks users normally keep the company file stored on the server, and 
the same company file can be accessed via different workstations on the 
network. However, a troublesome error message called ‘
QuickBooks Connection Has Been Lost’ can arise, thereby preventing 
access to the company file from various workstations.
The occurrence of this error message suggests that some technical fault is 
hindering the establishment of the required connection between the server 
& the workstation fixed on the network. Many experts have provided 
several methods to tackle this problem.
In the present blog, all the factors that can trigger this issue are mentioned, 
along with easy troubleshooting methods.
Are you looking for appropriate assistance regarding the 
‘QuickBooks Connection Has Been Lost’ error message? You 
need to dial 1.855.738.2784 to connect with our QB Technical 
Professionals Team.

Connection Lost Error in QuickBooks: What Are The 
Top Causes?
The main causes that are known to trigger ‘Connection Lost Error in 
QuickBooks’ are stated here:
• If there are network glitches or if the QB company file data is found to 
be damaged on the server, this error will arise.
• Not validating the security program settings (like firewall settings) on 
the server will provoke this problem.
Easy & Correct Methods To Rectify The 
‘QuickBooks Application Connection Lost Error 
Message’
You need to implement the following methods to remove the ‘QuickBooks 
Application Connection Lost Error Message’:
Method 1: Effortlessly resolve this issue by 
operating the ‘QB File Doctor’ utility on 
the server computer
• First of all, ensure that you have opened the official Intuit website on the 
server & you can thereafter tap the appropriate weblink to download 
QuickBooks Tool Hub.
• The precisely downloaded file (‘QuickBooksToolHub.exe’) must be saved 
inside any appropriate folder like the ‘My Files’ folder located on the 
server.
• After that, the same folder should be opened & you must run the 
required file (‘QuickBooksToolHub.exe’) to finish the QB Tool Hub 
installation on the server.
• Now, seamlessly open the valid QB Tool Hub window & effortlessly select 
the ‘Run QuickBooks File Doctor’ icon provided inside the ‘Company File 
Issues’ tab.
• Thereafter, correctly load the QB company file using the ‘Browse and 
Search’ tab and promptly type the admin password to begin the 
execution of the same technical utility.
• Finally, the same QB company file will be repaired & you will surely 
succeed in opening the company file from the required workstations.
Method 2: Utilize the ‘Uniform Naming 
Convention (UNC)’ syntax to open the 
company file based on the server
• After carefully opening QB on the workstation, you will select the ‘Open 
or Restore Company’ tab via the ‘File’ menu, and you must immediately 
choose the ‘Open a Company File’ icon.
• Now, promptly double-click the ‘My Network Places’ icon placed in the 
window, after which you need to navigate through the network to reach 
the company file folder based on the server.
• Thereafter, choose the company file icon & instantly hit the ‘Open’ 
button to launch the selected company file.
By using the best troubleshooting methods discussed above in the correct 
order, you can surely eradicate the ‘QuickBooks Connection Has Been 
Lost’ error message. For further analysis & technical information, 
dial 1.855.738.2784 to connect with our QB Experts Team.