What is QuickBooks Error c 343? [Updated Solutions]

by Data Service Solutions QuickBooks Certified Expert

An error is a fault of any software that may come up on different operating systems to disturb your entire workflow. The glitches in QuickBooks take place due to some error codes and QuickBooks error C 343 is one of them. It prevents users from using the QuickBooks Desktop application on Windows. You usually might come across this issue when you are unable to access the QuickBooks company files. Whenever the

QuickBooks Desktop Error C 343 comes up, the following error message starts displaying on your screen “Unexpected Error: An error has occurred in QuickBooks Please restart QuickBooks to try again. If you continue to experience this error, please note the C = value and contact. C = 343.” The error prompt reports that restarting QuickBooks doesn’t always help to settle such an issue.

What does QuickBooks Error c 343 mean?

Compatibility is the top requirement for running QuickBooks software on Windows. If the software is not compatible with the current version of your Windows operating system then there is not much a user can do.

If you are using a discontinued version of QuickBooks Desktop, it might decline to run on Windows due to several factors including old library dependencies, security issues, and 16, 32, or 64-bit emulation environment.QuickBooks Error message c343 displays due to Windows Compatability issues. 

Reasons why are you getting QuickBooks Error C 343.


QuickBooks Error C343 falls under the category of C = XXX series of errors wherein C=343 takes place due to several reasons. Some of the major ones are presented below: 

  1. If the file is missing or corrupted.

  2. An older version of the Windows operating system triggers QB Desktop Error C 343.

  3. The unregistered files may also lead to QuickBooks company file errors.

  4. When the Microsoft core XML services (.dll) files are unregistered, damaged, or missing.

  5. The same error can also be noticed if the files are unregistered.

  6. In case you have not updated your QuickBooks Desktop to the latest available maintenance release, it gets prone to the error code.

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How to permanently overcome QuickBooks Error c 343?

There can be a couple of fixations that are performed to settle the QuickBooks error code C=343. Here’s a list of some common ones, let’s have a glance: 

Troubleshooting step 1: Run QuickBooks in Safe Mode 

  1. In the inception, hold the Ctrl key and then click twice on the QuickBooks icon.

  2. This will open QuickBooks in safe mode with multiple company files.

  3. Now, tap on the company file.

  4. Choose the open file option and browse through the documents.

  5. If QuickBooks opens, and the new company file is not opening, then carry out the steps to verify and rebuild the company file:

  • For this, select file

  • Go to the file operations

  • Verify rebuild

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Troubleshooting step 2: Uninstall and reinstall MSXML.dll files

  1. To start off, it is required to open the download page and then look for the Microsoft Core XML files.

  2. Now, install these files or folders on your software program. 

  3. You need to give a double-click on the MSXML.MSI file and then follow the detailed instructions outlined on the screen.

  4. The final step is to reboot your QuickBooks desktop and check if the error still persists or not.

To Sum-up!

Hopefully, you are now able to eradicate QuickBooks Error c 343 after going through this write-up. However, if still, you’re experiencing this company file error due to windows compatibility issues then feel free to ping our QuickBooks technical error support team. They get always ready to assist you with the best possible techniques which resolve the issue from its root. 

Check out this page if you want to Solve the issue of QuickBooks Desktop Won't open.

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About Data Service Solutions Innovator   QuickBooks Certified Expert

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Joined APSense since, September 26th, 2022, From Plano, United States.

Created on Nov 9th 2022 09:12. Viewed 338 times.


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