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Managing user accounts and company files > Servicing your company file > Troubleshooting file-locking problems
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, called Lock000*.flk, keeps track of who is using the company file. When you log out of the company file, the lock file is deleted automatically.
The file is named Lock????.flk, where???? stands for a number from 0001 to 0010. If there is more than one company file in the same folder, the number allows your software to create a different named lock file for each company file.
Sometimes, however, the lock file is not deleted. This can happen if your computer crashes or an error causes your company file to close unexpectedly. Lock files can accumulate in the company file folder, resulting in error messages appearing when you try to access your company file again.
To resolve these error messages, you must exit your software, open the folder that contains the company file and delete any lock files that it contains. You should then be able to open your company file without an error.