QuickBooks Error 6143 is a company file error that typically occurs when the software encounters issues accessing or reading the company file. To resolve this error, follow these steps:

Check File Location: Ensure the company file is stored locally on your computer and not on an external drive or network location. Copy it to the local drive if necessary.

Run QuickBooks File Doctor: Download and run the QuickBooks Tool Hub, then use the File Doctor to diagnose and repair the company file. This tool can automatically fix many common issues.

Rename .ND and .TLG Files: Locate the .ND and .TLG files associated with your company file and rename them by adding ".old" at the end. These files help QuickBooks manage data and can sometimes cause errors if corrupted.

Disable Antivirus Software: Temporarily disable any antivirus or firewall software that might be blocking QuickBooks from accessing the company file.

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