What is a lock file?
When a company file is open, a temporary file called a lock file is created in the folder where the company file is stored. This file keeps track of who is using the company file.
Lock files are named Lock0001.flk, Lock0002.flk, etc.
When you log out of the company file, the lock file is deleted automatically. If AccountRight isn't closed properly or the program exits abruptly, the lock file isn't deleted. Lock files can accumulate in the company file folder and prevent your company file being opened.