Guide To fix QuickBooks error C-343

What Does Mean By QuickBooks Error C-343?

The QuickBooks trouble code C=343 is the company file issue in the QuickBooks application. Basically, it means that you cannot run the QB company file after trying to open QuickBooks Desktop. Due to this error, you experience difficulties accessing company files in Intuit QuickBooks software. And several times, your QB app stops responding because of this issue .

Why does the QuickBooks error C=343 appear?

• There are several instances where you experience a QuickBooks trouble code C=343 on your system. Let me share some of them:
• A missing, damaged, or unregistered MsXML.DLL file can lead to a QuickBooks C=343 issue
• Whenever you don’t use the latest version of QuickBooks, you also face a QuickBooks C=343 issue.
• Another reason for the QuickBooks error C-343 issue to occur is the antivirus or firewall configuration installed on your system

Top solution to remove this Error code 343

Method 1: Registering the dll file to resolve QuickBooks error C 343

You may encounter QuickBooks error C 343 due to a compatibility issue between Windows and your QuickBooks application. You can solve the problem by registering the necessary dll file.
Follow the steps below if using a 32-bit computer system:
• Open your computer and click on the ‘Start’ menu.
• Type “command” and right-click the “Command Prompt” search result.
• Select the option ‘Run as administrator

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• Type the command “Regsvr32 MSXML3.dll” and hit the ‘Enter’ key.

• When you get the message saying “success”, restart your QuickBooks application.
If you are using a 64-bit computer, the steps are as follows:
• Type “cmd” after clicking the “Start” button.
• Open the ‘Command Prompt’ in the search result as an administrator.
• Open your computer’s C drive, click ‘Windows’ and then go to ‘syswow64

• Press ‘OK’ and then type “Regsvr32 MSXML3.dll” and hit the ‘Enter’ key.
• Type “Regsvr32 MSXML4.dll” and press the ‘Enter’ key again.
• Restart your application once you receive the success message.

Method 2: Reinstalling MS XML files

If registering the MS XML files does not resolve the error, you must reinstall them on your computer. Find the detailed steps below:

• Open your web browser and Google “Microsoft Core XML Files”.
• Click on the search result to access the download page.
• Download the MS XML file and click the downloaded msXML.msi file to install it.
• Restart your QuickBooks application and check if the error is resolved.

In addition to MS XML files, there are some other factors that can also affect compatibility. If the above methods do not resolve the error, try disabling compatibility mode for the QBW32 file

Method 3: Disable QBW32.exe file compatibility

• Open File Explorer window and go to C drive.
• Access the QuickBooks installation folder under ‘Program Files’.
• Find the QBW32.exe file in the installation folder and right-click on it.
• Select the ‘Properties’ option.
• Go to the ‘Compatibility’ section and uncheck the box saying ‘Run this program in compatibility mode’.
• Click on the ‘OK’ button for the changes to take effect.

Open QuickBooks and log in to your company file to see if the error is resolved using these steps. You can also try running the QuickBooks File Doctor tool or the QB Install Diagnostic Tool from the QuickBooks Tool Hub if the error persists