You can ask OneLiner users on the network, who had launched the program and are no longer actively using it to shut down their OneLiner session to free up seats on the license key.
If you are running OneLiner with a legacy Hasp HL-net license key, you can run the Hasp monitor utility tool on the license server to view the name and/or IP address of the PCs that are currently using the license. Download link for the Hasp monitor tool is available on the ASPEN website user download page:
https://www.aspeninc.com/web/support/user-downloads
If you are using a Hasp HL-Net Sentinel sector, open the Sentinel Admin Control Center on the license server to view the active license key sessions:
1. Enter the following in the web browser
http://localhost:1947
The Sentinel Admin Control Center will appear.
2. Click on Sentinel Keys on the left side menu panel
3. Locate the key with vendor id 42251 and click on the Sessions button in the Actions column to view details of the current network connection sessions of the key.