Simple Solutions for QuickBooks Error 6073 QuickBooks Error 6073 happens when access to the company file is blocked because it is already being used or opened on another machine. This error causes irritation and perhaps data problems by interfering with accounting activities. Closing all open QuickBooks sessions, making sure files are hosted properly, and confirming multi-user setup options are usually the steps involved in fixing it. For professional help with QuickBooks, give 1.855.738.2784 a call. URL: https://accountinghelplinesupport.weebly.com/blog/quickbooks-error-6073-unable-to-open-company-file-fix