One main reason can also be the company name is too long.QuickBooks software version might be outdated.May be you are using the wrong method to open the file.It might be the file is already been opened on another system using multi-user network.Due to the company files get corrupted or damaged.Some of the common factors are given below: There can be plenty of factors which causes company file not opening in QuickBooks problem. Reasons if “QuickBooks Unable To Open The Company Files” The required thing you should do is to read out this blog post from top-to-toe carefully and perform the tasks as it is on your own. If you are also the one who tries to open QuickBooks Company file or data but unfortunately it prevents to be opened, then don’t feel blue! You are at right place as here the complete troubleshooting procedure will be in your hand. As sooner as users resolve this issue, they can work with QuickBooks Help by hassle-freely opening their company files or data. QuickBooks won’t Open is the one common problem that might be arisen unknowingly and the users get infuriated because most of the important task is on pending.