If you are unable to open your company file in QuickBooks, you might be encountering QuickBooks Error Code 6000, also known simply as QuickBooks Error 6000. This issue usually occurs when there’s a problem with the company file, hosting setup, or network configuration. It may appear as errors like -6000, -82 or -6000, -83, each indicating slightly different causes. Understanding the reasons behind this error and applying the right fixes can help you get QuickBooks running smoothly again.