Hello, everyone. I'm Jessie, and I'm here to help you with your finances. Many QuickBooks customers come to me and inquire about the reasons for 'QuickBooks error 6073.' Any of the following are common causes of this error. On another machine, a user opens this file as a single user. The file is in a network folder that may be read. All files are hosted on a Linux server, and instead of using one's own credentials to sign into a shared folder. Remote support software is being used to get access to the file.