How to fix error -6143, -301?

I'd be glad to assist you with fixing the error code -6143, -301 to ensure you'll get to back up your data file in QuickBooks Desktop (QBDT).

Possible data damage can make QuickBooks Desktop (QBDT) behave unexpectedly, which might have caused the error when backing up your company file. To make sure you'll get to see the missing option, let's perform some troubleshooting steps that help fix unexpected and most common issues in QuickBooks by verifying and rebuilding your company file.

Let me guide you through the steps on how:

Verify data (scan company file for errors or data damage)
 

1. Go to Window, then select Close All.
2. GO to the File menu, then select Utilities.
3. Select Verify Data. If you see: 
   a. QuickBooks detected no problems with your data—your data is clean, and you don’t need to do anything else.
   b. An error message—search for it on our QuickBooks Desktop support site for how to fix it.
   c. Your data has lost integrity—Data damage was found in the file. Rebuild your data to fix it.

To Rebuild your company data, kindly visit this article for detailed steps on how: Verify and Rebuild Data in QuickBooks Desktop.

Moreover, I'll also share this article to learn more ways how to fix QuickBooks' common issues: Fix common problems and errors with the QuickBooks Desktop Tool Hub.

I'm looking forward to having this sorted out. I'm only one reply away if you require further assistance. Have a good one!

@anfrance21-yahoo 

You need to use a supported version to convert data to QBO. You can use the trial version of QBD 2015, 2018, and 2021 to upgrade your data gradually and convert it to QBO.