6175 errors are fairly common in QuickBooks, and the majority of them are related to issues with the company file. QuickBooksDB is a service required by QuickBooks users to host a company file in a multi-user environment, and Quickbooks error 6175 occurs when your system's firewall application prevents QuickBooks Database service from running on Windows.
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QuickBooks Error Code 6175, 0: In general, this error code can be seen when a QuickBooks user tries to open/access the company file located in the local server. This happens when the database server does not respond or QuickBooks is unable to read the database services.