Cannot open QuickBooks Company File (Error Codes: 6123, 6189, C=343, C=42)

Published by John Smith at December 27, 2018

QuickBooks error code c=343

When you open QuickBooks desktop you get a C=343 or the file name is not executable. This error may cause windows computer working framework’s Microsoft Core XML Services DLL (MSXML.dll) record is absent, harmed, or unregistered or restriction to access your company file and QuickBooks may not respond.

Here we will start to resolve error C=343.

Update QuickBooks Desktop to the latest release
In this case, one need to Update QuickBooks application to the latest release and open the QuickBooks once again after updating.
Register the MSXML.DLL files

For 32-bit Computer Users:

Open Run window
Type “Regsvr32 MSXML3.dll” and hit OK.
There will be a message “Succeed” means the file is registered.
Restart QuickBooks.

For 64-bit Computer Users:

Open the “Run” window
Now enter “cmd” and not enter “Ok”
Now type “Regsvr32 MSXML3.dll” and hit “Enter”.
After registering both files restart QuickBooks.

Uninstall and Reinstall the MSCML.dll

Download Microsoft Core XML and then install MSI file.
Open the file by double-clicking on “MSCML.MSI” and follow the instructions appearing on the screen.
Restart the QuickBooks for operation.

Now we will talk about Error 6123, 0 when an opening company files in QuickBooks:

The QuickBooks error 6123, 0 generally occur when opening or upgrading a company file to a new version of QuickBooks, opening a company file in multi-user mode, opening a company file over a network, or restoring a backup.

Here we have 4 steps to perform to fix this particular issue:

Download and Run QuickBooks File Doctor
Fix settings manually
Reinstall QuickBooks
Troubleshoot possible data damage

Step 1: Run the QB file doctor:

This tool is currently only available in UK, USA, and Canada and its purpose is mainly to fix broken company files which have gone corrupt because of a variety of different reasons. This solution is recommended if you are updating your company file to a new version of QuickBooks.

Download the QuickBooks File Doctor to your
Doubleclick on “qbfd.exe” file once download completed. And go with all positive instruction in order to install QuickBooks File Doctor.
Use the drop-down list to find your company file (this is based off your last 10 opened companies). If you do not see your company file on the list, click on the Browse button and manually locate it to continue.
“File damage and network connectivity” Option will come up, make a check mark on both of the options. (If you suspect your company file is damaged, or you see a 6xxx error (such as -6150, -6000 -82, -6000 -305, -6000 -301, -6147, -6130, or -6123) when you try to open your company file (data file problems).
Entered the Admin password when prompted. And then click on next.
A prompt will come up to choose between Host/Server or Workstation. Select the right option. It will take time to finish File Doctor diagnosing.
Repair and diagnosis after QuickBooks File Doctor complete.

Step 2: Reinstall Using a QuickBooks Clean Install

Open Control Panel and go to add or uninstall the application
Choose QuickBooks and click on uninstall.
Repair and Remove. Choose to remove to uninstall QuickBooks.
Choose Yes.
Click Finish and restart your computer.
The next thing in the process is to rename the installation folders so that QuickBooks does not use the remaining files after you reinstall it. This is an easy task.
Click on THIS PC option from the desktop. And the Go to C drive and click on Windows
Navigate to each of the folders displayed below and rename them by adding ‘.old’ to their name.
C:\ProgramData\Intuit\QuickBooks (year)
C:\Users\ (current user) \AppData\Local\Intuit\QuickBooks (year)
C:\Program Files\Intuit\QuickBooks(year)
64-bit version C:\Program Files (x86) \Intuit\QuickBooks (year)

An error occurs when QuickBooks tried to access the company file (-6189, -816).

Usually, this error occurs while the user tries to login company file during the multi-user and single user QuickBooks software. The possible reason when network file of the QuickBooks with an extension .nd has an issue or company file. But in single user you have nothing to do with network or multi-user hosting system, still, this error is one of the biggest issues in QuickBooks pro single user.

Solution I: Reboot Your System and Server

If you are working on QuickBooks solution.
Close the software.
And then restart the system.
Restart server if company file is on Server computer.

Solution II: Install DBMS (QuickBooks Database Manager)

Install entire QuickBooks or just QuickBooks Database Server Manager
Installed where you have located your company file.
Use the same license and product number to install the Database Manager
Restart Server once you are done installing Database Manager

Solution III: If Data file stored on a network Drive

Open QuickBooks software.
Make sure you are not locating your company file on any removable or network drive.
QuickBooks Database Manager can’t run on network drive location because all functions do not work properly and this is one of the main reason for damaging data.

Hope that helped

We have tried our best to resolve this issue in the above blog. In case you would like professional assistance, you are welcome to contact the QuickBooks Desktop Help Desk Number 1.877.221.952O They should resolve all your errors within a minimum delay time.