QuickBooks Error 6143 typically occurs when there is an issue with the company file or a system problem affecting the software. To resolve this error, follow these steps:

Run QuickBooks File Doctor: Download and run the QuickBooks File Doctor tool from the QuickBooks Tool Hub. This tool can help repair the company file and diagnose network issues.

Check File Extensions: Ensure that your company file has the correct .QBW extension and is not corrupted. You can also try opening a sample company file to see if the issue is with your specific file.

Rename the .ND and .TLG Files: These are configuration files that QuickBooks re-creates automatically. Rename them by adding .OLD to the file extension, and then try reopening your company file.

Move Your File: Transfer your company file to a different location on your system or a different computer to see if it's a problem with the file path or location.

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