What Is QuickBooks Error Code C=343?

QuickBooks Error C=343 is a data damage error that pops up on your screen when the MSXML.DLL files gets corrupted or damaged. This error can randomly occur on your screen and you may be restricted from accessing your QuickBooks company file as it may be a result of damaged company file. This is a common error from the C=XXX series and the best way to avoid this error is to updating your QuickBooks Desktop to the latest release. You can contact QuickBooks Customer Service department for better information about this error.

QuickBooks Error C=343: Causes

Main causes for the error code C=343 in QuickBooks are as given below:

  • Damaged, missing or unregistered MSXML services .dll file: DLL stands for Windows Dynamic Link Library which is required for programs and internet browser extensions and all other software that contain program, chose, data and resources.
  • Using older version of QuickBooks: One of the most common factor that leads to this error is that you might be using an older or outdated version of QuickBooks Desktop. You need to update to the QuickBooks 2020 version and this error will automatically get resolved. You can press the F2 key to check if any version update is available or not.

How To Resolve QuickBooks Error C=343

Before you start performing the below steps, make sure you have registered QuickBooks on your system. If not, do it while the QuickBooks is not open. Now, run QuickBooks to check if the error is still around or not. If the error is still there, you need to follow the steps mentioned below:

Solution 1: Update QuickBooks To The Latest Version

  • Run QuickBooks and while being on the home screen, press the F2 key to check the latest updates.
  • Download all the available updates and then install them.
  • Once you are done with the update, close QuickBooks and then restart your system.
  • Run QuickBooks again to check if the error is resolved or not.

Solution 2: Records The MSXML.DLL Files

For 32 bit Windows operating system:

  • Open the Run command by pressing Windows + R keys.
  • In the search box, type dll and hit enter.
  • You will get the DllRegisterServer in C:\[Windows Folder]\system32\MSXML[Number].dll succeeded message once it is registered properly.
  • Restart QuickBooks to check if the error is resolved or not.

For 64 bit Windows operating system:

  • Open the Run command by pressing Windows + R keys.
  • In the search box, type cmd and hit enter.
  • Type CD\ and you will be redirected to the C drive of your system.
  • Now, type Regsvr32 MSXML3.dll in the command prompt and hit enter.
  • Type Regsvr32 MSXML4.dll again and hit enter.
  • Once both dll files are registered, close QuickBooks and run it again.

Solution 3: Uninstall and reinstall the MSCML.dll Files

  • Open an internet browser and go to the official website of Microsoft.
  • Now, from the download page, download the Microsoft Core XML component.
  • Install the files in your system
  • Run the file and perform onscreen prompts.
  • Once the installation finishes, restart QuickBooks and check if the error is resolved or not.

Customer Support For QuickBooks Error C=343

Following the provided steps in this article should be helpful for you in resolving the QuickBooks Error C=343 very easily. We have provided three different solutions to tackle this one error. You need to perform steps as in the shown sequence to get best results. However, if the error is still occurring, there are chances that your QuickBooks data files are seriously corrupted, and you need to resolve data damage issues as soon as possible. For this, you can connect with our QuickBooks ProAdvisors by dialing our toll-free QuickBooks Support Phone Number +1800-366-1468 and get instant solution for your issues.

QuickBooks Error Code C=343

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