One of the explanations for such errors might be the plan to close all files at one go; doing so often causes QuickBooks to crash. so as to see if this is often the difficulty , users should try closing them one at a time. Close the topmost window and await a short time to see if the program crashes. If the window closes, then users should continue closing the windows sequentially till the corporate file itself is closed. For more info contact now- 1-855-481-5338.