QuickBooks Error 6000 occurs when you are trying to open a company file. This can happen when multiple users are logged into the same company file at a time. QuickBooks Error Code 6000 might take place when you are simply trying to bring back a previous backup of your files.

QuickBooks Error 6000
What causes QuickBooks Error 6000?
A firewall is somehow blocking the connection between the two computers.
Maybe the .TLG file is damaged and is causing the QuickBooks Error 6000.
QuickBooks installation was corrupted and hence incomplete.
A computer that is not the actual server is hosting the company file.
There is an incorrect Network Setup that is leading to the error.
A company file with a .qbw extension has been damaged.
There is a chance that another user has logged in to the company file when you are working in single-user mode.
Whenever the. ND file is not working in the correct way, it can lead to Error Code 6000.
In case the company file was corrupted, it can lead to the error.
Symptoms of the QuickBooks Error 6000
Below is the list of symptoms that appear at the time of the QuickBooks Error 6000.

Whenever the “QuickBooks Error 6000” is displayed, it damages the program window.
When the message gets auto-populated and appears on the screen as “Windows Installation Error Code 6000”.
Windows automatically runs slowly and also responds at a very slow pace to the mouse or keyboard input.
Your computer is most cases “Freezes” for some time.

Solutions to resolve QuickBooks Error 6000
Follow the below-mentioned troubleshooting steps for QuickBooks Error 6000 when you are opening the company file.

Solution 1: Open a Sample of the Company File
The user needs to open the folder that contains the required company file.
Now with the help of the extension of .QBW, find the file.
Simply “Right-Click” the file then Click on Copy.
On your desktop, then right-click on the desktop and click on “Paste”.
Open QuickBooks so you are directed automatically to the No Company Open window while holding down the control key.
Bring back an existing company.
Find the company file you first copied, open it and then Navigate to the desktop.
Solution 2: Copy the QuickBooks File on the Desktop
The user needs to open the folder that contains the company file.
Now the second step is to find the file with the extension .QBW.
The third step is to right-click on the file and then select Copy. Go to the Desktop, right-click anywhere on the desktop and then Paste.
While holding down the control key, open QuickBooks and you are then directed to the No Company Open Window.
Click to Open an existing company. Now simply Navigate the desktop and then Find the company file that you copied and open.
Also Read: How to Fix QuickBooks Error 6000 82?

Solution 3: Recreate Damaged Folder to resolve Error 6000
On your C:\drive Create a new folder
The user needs to open the folder where the company file is saved.
Locate the .qbw file.
You need to Right-Click the .qbw file and select Copy.
Open the new folder, right-click and select Paste.
Going forward you need to set the access permissions for Windows in order to share company files.
Open QuickBooks Desktop and open the file from the new location.
Solution 4: Restart the client computer
By restarting your computer system, this will bring the system up from scratch and swipe away the current state of the software.

Solution 5: Rename .ND and .TLG files
You need to search the files with accordance to your company file with the same file name but with extensions .ND and .TLG
Then you can simply Rightclick .nd/.tlg file and then choose to Rename it. Please add the word “.old” after the file extension and then make sure to press enter.
You have to follow the following steps to rename .ND and .TLG files in order to fix the QuickBooks error 6000 whenever opening a Company File:

You, first of all, need to Restart QuickBooks Database Server Manager.
Please ensure to re-scan the company file.
Then Click on Start and Select All Programs.
Select the QuickBooks and click on QuickBooks Database Server Manager.
Click the Scan Folders tab and select the Add Folder.
With the files, otherwise, highlight the folder and click Scan.
Make sure that the company file in question always shows in the bottom box with the heading of “QuickBooks company files found”.
Now after this try to open the file again.
Try to sign in to your company file after opening QuickBooks. If the same issue persists, then you have to follow with the next solution.
Solution 6: Shut-Down all QuickBooks processes
On the server computer, you need to Log-in as “Administrator”
To bring up the task manager press Ctrl+Shift+Esc
Please select the Users Tab, Show processes for all users.
On every QuickBooks process highlight, then select End Task.
Need to Open the file in the “QuickBooks Multi-User Mode”.
Solution 7: Make usage of UNC path instead of a mapped drive
On your desktop in the first place Right-click the QuickBooks icon.
Then press and hold the Ctrl key and select Run as Administrator.
Until and unless you have the No Company Open Window hold down the Ctrl Key.
QuickBooks Desktop from auto-opening a company file gets avoided when you hold down the Ctrl Key.
Click Open or Restore Company, From the File menu.
You can now Select Open a company file and then click on Next.
Click Network, and in the Left Pane and navigate to the location of your company file.
if in case you can’t find the folder where the company file gets saved then in that scenario set folders permission.
Select to choose the company file and then simply Click on Open.
You need to follow the above methods and steps in a definite order to solve QuickBooks Error 6000. If the problem still remains unresolved – connect at QuickBooks Error Technical Support.