According to Intuit, Error Code -6000, -82: “An error occurred when trying to open the file” or “An error occurred when QuickBooks tried to access the company file” indicates that QuickBooks can’t access the company file, which is located on another computer. This error code occurs in multi-user environments.
There are a number of troubleshooting steps to resolve this error that are discussed in detail in the Intuit knowledge base article linked below. Several of these steps involve checking the Hosting setting. To verify the Hosting setting, press F2 while QuickBooks is running to display the Product Information window. The Local Server Information block shows the Hosting setting at the lower left of the window.
For more information on resolving these errors, consult this Intuit knowledge base article.