No matter what good software program is, every software has some errors. In QuickBooks Error 6190-816 is amongst the most common errors found.

Error Code -6190, -816 is described as “QuickBooks was unable to open the file [path] in the host computer.” Which means your company file is certainly not accessible. This could as a result of a variety of reasons, including:

The Transaction log file is certainly not matching because of the company file. The Transaction log file could be the summary of transactions done by the organization and it is automatically saved by QuickBooks. It is stored as [company file name].qbw.tlg file. You can’t open it to convert this file into Company Data File (qbw). Hence, if the “QBW” file does not match along with its linked “TLG” file, the QuickBooks shows error -6190, -816.
Another reason may be due to update failure. When a company file is updated on a different sort of computer without updating its transaction file, it will show error -6190, -816.
Third basis for this error could be caused when another user is accessing the organization files in Single User Mode.
The least possible basis for this error is Data Corruption when you look at the QuickBooks data file. But it is important to identify the info corruption in QuickBooks.
How exactly to resolve QuickBooks Error code -6190, -816: Before performing anything in your QuickBooks, make sure your QuickBooks application is updated aided by the latest version. Use QuickBooks File Doctor Tool:

Download and install “QuickBooks File Doctor” tool.
Run the tool.
You need to be logged in as Administrator. If you don't, it will probably direct you to definitely do so.
It will probably show you two options: Both file damage and network connectivity and Network connectivity only
Choose the first option because it will detect corrupted or damaged files and will make it possible to fix the error -619.
Next, it will ask for a password. Enter your Admin password.
It will probably then ask whether or not the company file is on Workstation or Server.
Select “Yes” if you’re making use of the company file on the server and “No” if using from Workstation.
Click on “Proceed.”
The outcome are going to be displayed. It will probably automatically detect and repair the corrupted company file. In the event that error still persists, continue to next solution: Fix the mismatch: Make sure you're with the same computer by which you've saved the company file. Next, what you need to do is rename the files. Renaming these files will not cause any data loss. Stick to the below-mentioned steps:

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Open the business folder.
Next, you need to find the company file. The transaction log file and company file may have the same name but different extensions. For example, company file should be named as [company file name].qbw.nd and transaction log file should be named as [company file name].qbw.tlg
Right-click the organization file and select "Rename" option. Enter any new name or just add "-OLD" at the end of the name. Don't delete extension or ".qbw.nd" through the end.
Same way, rename the transaction log file without omitting the extension.
Exit the machine now.
Open QuickBooks and attempt to login in the company file.
If you still get error, then try next solution: Single Mode User Check:

Make sure most of the users are logged from the QuickBooks Data file.
Next, restart the computers.
Now copy the data file into the desktop or to another location apart from its source.
Again copy the info file back again to its original location.
Sign into QuickBooks.
These are the possible fixes of QuickBooks error code 619, 816. And when you still can’t access it, you will need to buy the “Auto Data Recovery” tool by The Intuit Data Services to recoup the files.