QuickBooks Won’t Open Company File: Simple Solutions to Fix It
QuickBooks is an accounting software app that is used by businesses of all sizes. While using QuickBooks, if you get error messages such as “QuickBooks Company Files Too Large” or “QuickBooks is unable to open this company file” then we can help you. This article offers useful tips to troubleshoot error QuickBooks won’t open company file.

Files may not open in QuickBooks for reasons such as
Corrupted or damaged QuickBooks Company file.
The file is already opened by another user on the shared network.
Using wrong methods to open particular file types.
Issues with reports in the file.
Using an incorrect QuickBooks version to open files.
Issues like access permissions, encrypted or compressed files, problems with filename and extension, and corruption of the data within the file.
Error messages can include:
“ -6000 series mistakes – for example -6189, -6144, -6123, or -6000” and these can be resolved with the Stellar Repair for QuickBooks Software.
quickbooks error 6000

“C= messages like C=422 or C=343.”
“ Unrecoverable error messages.”
Unrecoverable error message

“3371 which indicates that the QuickBooks installation is damaged.”
Error 3371 in QuickBooks

QuickBooks Error -6073, -99001.
QuickBooks error 6073

QuickBooks Error -6073, -816.
QuickBooks error 6073 816

You can try the following methods to resolve the issue, in which there is also an automated tool that you can try to diagnose and solve the problem.

How to Troubleshoot the Issue
Try the following steps in the order given if you see any of the above error messages before utilizing the QuickBooks File Doctor to diagnose and correct the file.

First, ensure the problem is with the file and not with the program. Press the Control key and double click on the QuickBooks icon. If QuickBooks does not start, that is the problem. But if this is not the issue, continue with the following steps
Ensure you are using the latest updated version of QuickBooks.
Open the file with the same QuickBooks version that last opened it. You can do this task as follows:
In Windows, find the company file on your device.
Right-click this file to choose properties.
In the Properties page, choose the QuickBooks tab.
There will be a box that shows the previously used version.
Open the company file through QuickBooks. To do so,
Go to the File menu, and choose Open or restore company.
Choose the appropriate radio button based on whether is a backup file, working company file, etc.
Go the place where the company file is located and select the file.
Implement the steps to place the file in the correct location. For Accountant’s Copy, go to the File menu, and select ‘Convert accountants copy transfer file’.
Stop reports as well as other QuickBooks windows from opening by pressing the Alt key.
Select the file and press the Alt key.
Now, click Open. If you get a login window, release the Alt key and provide the login information.
Press the Alt key again when you click OK.
Hold the Alt key until the file opens or you get an error message.
Try to open a sample company file. If the file does not open, then the problem is with the QuickBooks installation.
Change the location of the company file.
Take a look the properties of the file. Go to Windows Explorer and right click the File to choose properties. The file size should be at least 7 MB, and it should not be encrypted or compressed.
Try renaming the file.
Remove multi-user access by clicking on the Utilities button in the file menu.
Try Stellar Repair for QuickBooks Software to Troubleshoot this Issue
This software recovers all the information hosted in corrupt QuickBooks® files. A professional tool that fixes all types of corruption from QuickBooks® data files without interfering with the software’s file components. In addition, it recovers all the information of employees, vendors, company, and customers saved in QuickBooks® data files.