How to Troubleshoot QuickBooks Error Code C=343?

QuickBooks error code C=343 usually comes up with an error message stating “The filename is not executable” or “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 technical support. C=343” when the user opens up QuickBooks desktop software. This sort of error can cause restriction to the access the company file and QuickBooks may not respond. The user is recommended to update the QuickBooks software at a regular interval and upgrade it to the latest version.

The user can come across QuickBooks error codeC=343when the MSXML file is damaged or missing. There can be various other factors causing this sort of error, which we will be discussing later in this post.


Thus, make sure that you read this post carefully till the end. Or an alternate for the same can be to get in touch with our 24X7 QuickBooks error support team. Our experts and certified QuickBooks professionals will ensure to provide the best possible support services.


Causes of the QuickBooks error code C=343

  • The error might appear when the file gets damaged
  • Or in case the file is missing
  • The user might also face an issue, when the file is unregistered
  • If the user is not running the latest release of QuickBooks accounting software, then this issue is probable to happen
  • Microsoft core XML services.dll files are unregistered damaged or missing


Steps to fix the QuickBooks Error Code C=343 Issue

The user can simply download and run the QuickBooks install diagnostic tool to fix the issue. The steps involved in this process are as follows:


  • Initially, the user needs to download QuickBooks install diagnostic tool
  • And then, save the file
  • Now, the user needs to run the QuickBooks install tool and then shut any open programs
  • After that, this might take around 20 minutes to complete
  • And towards the end, the user needs to ensure that the components are properly updated and also, reboot the system after running the tool


Towards the end of this post, we expect that the information shared in the post above will help in rectifying the QuickBooks error code C=343. However, if the error persists, or in case of any query, feel free to call us at our toll-free customer support number i.e. 1-888-291-2294.

Our QuickBooks enterprise customer support team will ensure to provide immediate technical assistance to all your issues. Thus, feel free to call us at any point of time.


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