If at all you are attempting to open your company file and suddenly you come across the QuickBooks Error 6000 80 , please note that QuickBooks has faced a hindrance and that needs to be fixed for better functioning. This error shows that you are not able to work on your company file or even open it. QuickBooks error code 6000 80 may occur on both local and network setup. To resolve this, you have to choose the correct setup from these two options. What causes QuickBooks Error 6000 80? QB Error 6000 80 can occur due to the following factors – Conversion or restoration of data takes place over a network. QuickBooks data file is being hosted by many computers. The communication between server and QuickBooks is not taking place. The data in the company file is damaged.