QuickBooks Error 6175 When you try to access the company file, you may run into QuickBooks error 6175 . It is mainly seen in the multi-user mode, preventing you from working on your crucial company files. The possible causes behind it are considered to be improper firewall settings, a malfunctioning database server manager, a busy server computer, and many more. Additionally, you can see the error if QB fails to start the database server manager. To get out of this issue, you