This article describes why a connection to the company file may have been lost and how to troubleshoot a resolution.
Steps for resolving error -6190, -83 error, which can happen when more than one computer is set to host the same company file.
Provides steps to resolve error -6190, -82, which may occur when trying to open a company file on a Windows server.
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Steps to resolve error -6000, -83, "An error occurred when QuickBooks tried to access the company file," or a message about not having sufficient permissions to the specified folder.