The following message appears when trying to open a company file:
Another user is currently using this company file in single-user mode
The wording of this message may vary by QuickBooks Desktop version, release, or system configuration.
If a file can be opened on the computer where it's stored but not on a networked computer, the problem is caused by either the network, the computer system, or permissions. As a temporary solution, it may be necessary to share the file on a machine that is not the server until the system administrator can properly configure folder permissions.
Verify that the file is in multi-user mode and that adequate permissions are set for the folder where the file is stored.
Verify multi-user mode
Because of the complexity and number of available networks, Intuit cannot provide support for specific network issues. If you need further assistance with changing the network access type, check with your system or network administrator, the vendor from whom you purchased the network software, the manufacturer's or software developer's website, or a local computer consultant.