How to Fix QuickBooks Error Code 6010, -100? How to Fix QuickBooks Error Code 6010, -100? :- Users frequently encounter QuickBooks error number 6010 as a result of limited internet connection. This error message may show up on your computer screen if QuickBooks is unable to connect to the network due to a firewall or antivirus program. This problem may also arise after a QuickBooks Desktop reinstallation. We will discuss the reasons behind this problem as well as potential fixes in this article. What is meant by QuickBooks error 6010, -100? The error code -6010, -100 in QuickBooks shows up whenever you attempt to access the corporate file in multi-user mode. It happens when there is a problem with hosting settings or when the system hosting the corporate file is not the server. Such an error may also arise in the event that the company file (QBW) has a problem. Furthermore, there exist numerous other factors that may contribute to this 6000 series inaccuracy. Let's examine the ...