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How to fix QuickBooks Error C=343?

QuickBooks Error C=343

How to resolve QuickBooks Error C=343? QuickBooks accounting software is a critical component in reducing work-related stress. Occasionally, QB users get enraged when using this software due to experiencing issues.

These types of severe problems occur for a variety of reasons, and a user may get frustrated while attempting to resolve them. One of the most common causes of this problem is that you have not updated your QuickBooks program to the most recent version.

Also Read:- Quickbooks Error code C=51

We have examined the reasons and solutions to QuickBooks Error C=343 in this blog.

You may see this dialogue box on your screen:

QuickBooks Error C=343

What is Error C=343 in QuickBooks?

Occasionally, QuickBooks desktop customers get Error message C=343 or the file name is not executable error messages while attempting to launch QuickBooks desktop. This problem may result in users being unable to access their business data, as well as QuickBooks failing to reply or work correctly.

Also Read:- Quickbooks Error C=272

Causes of the QuickBooks Error C=343

  1. Microsoft XML Services.
  2. The dil file becomes corrupted, missing, or unregistered: MsXML. A DLL file is a dynamic link library (DLL) file for Windows. Programs and web browser extensions need DLL files because they contain program code, data, and resources.
  3. If you are not utilizing QuickBooks’s most recent release version:
  4. Simply check that you are running the most recent version and release it by hitting or holding the F2 key, which immediately shows the Windows Product Information.

Also worth your time:- Quickbooks Error number C=9

QuickBooks Error C=343 Troubleshooting

The following are the three most effective approaches for resolving QuickBooks Error C=343 To get the best outcome, follow the recommended solution in the sequence mentioned below. However, you may call our QuickBooks data recovery support staff to expedite the process.

QuickBooks Error C=343

Solution 1: Update QuickBooks

  • To begin, all end users must upgrade their QuickBooks accounting software to the newest version. (Note: QuickBooks Desktop 2019 is the most recent version.)
  • Reopen QuickBooks in regular mode.
  • If there is still an issue someplace, go to the next solution.

Also Read:- Quickbooks Error Number C=47

Solution 2: Prepare to record the MSXML.Dll files

This will focus your installation procedure into Windows; nevertheless, keep in mind that the product of an Intuit is not included.

Also Check:- How to fix Quickbooks Error ol=332

To run a 32-bit PC, follow the procedures below.
  1. To begin, start your Windows operating system.
  2. After that, in the run bar area, write “Regsvr32 MSXML3.dll”.
  3. To access the OK key, click on it.
  4. When it is successfully registered, the user will get a notification at the end indicating that it was successful.
  5. Restart your QuickBooks programme to do this.
  6. If the issues continue to occur consecutively, you will need to download or install Microsoft core XML services from any QuickBooks website.

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If you are using this programme on a 64-bit machine, please follow the procedures below:
  1. To begin, click on the start button on your Windows operating system.
  2. Then, in the dialogue box, enter it as the command.
  3. Select the OK button.
  4. Now, the user must open the ‘C’ drive.
  5. Enter the CD drive – then pick Windows > then enter syswow64 and then press the Ok key button once again.
  6. Following that, type as or enter Regsvr32 MSXML3.dll and then press the enter key.
  7. While doing so, type Regsvr32 MSXML4.dll and push or click the enter key button on your keyboard once again.
  8. After properly registering both files, restart your QuickBooks accounting programme.
  9. If this solution has not yet been resolved, go to the following solution to diagnose it.

Solution 3: Uninstall the MSCML.dll files and then reinstall them.

  1. Open the Microsoft Core XML files download page.
  2. These files or directories should be installed on your software application.
  3. Now double-click msxml.msi to open it and follow the on-screen instructions.
  4. Finally, restart the QuickBooks desktop application.

Additionally, see How to Troubleshoot QuickBooks Error OL-332.

Manually Resolve the Error

  1. To begin, the user must re-register all relevant files and folders in order to continue using QuickBooks accounting software.
  2. Restart the QuickBooks programme to see whether or not the issue has been identified.
  3. If this problem continues to occur repeatedly, you’ll need to download and reinstall Microsoft’s Core XML services.


The four options listed above should assist you in resolving the QuickBooks Error C=343. If you get stuck in  Quickbooks Error Message H202, Resolve It Now.

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