Description: Lock files (.LCK) are temporary files QuickBooks uses in multi-user mode to control access. If these files aren’t removed properly, they cause the “company file already open” error. Deleting these lock files after ensuring no one is using the file clears this problem and allows users to regain access.
Category: Finance
Tag: quickbooks already has a company file open, company file already open error quickbooks, quickbooks can't open second company file, error opening company file quickbooks, fix company file open issue quickbooks, quickbooks file in use problem