Remove all problematic files marked in red in the File list. >You are attempting to add a list that includes problematic files. The problem may occur for one of the following reasons: You cannot add files when using the Sentinel LDK Data Protection utility. If you repeatedly receive the error message, try using a different search mechanism. >There is a communication error with the machine on which the Sentinel protection key is located. Try restarting Sentinel License Manager in the Windows Services window. >Sentinel License Manager was not loaded. The error message might be for one of the following reasons: You receive an error message indicating that Sentinel License Manager was not found. By doing so, the Admin Control Center searches for the Sentinel protection key at a specific address, which is much faster. Use Admin Control Center configuration to specify a search criteria, and to define the server addresses to be searched. It is recommended that you customize the search mechanism. The application takes a long time to find the Sentinel protection key on a large network. To resolve this problem, run the command netsh winsock reset from an Administrator shell, and then restart the machine. As a result, WinSock configuration may be damaged. >Some other program that you installed may have incorrectly installed special TCP/IP drivers. >Confirm that the Sentinel LDK License Manager service is active. Web pages for Admin Control Center do not display in your Web browser on a Windows machine. >Check that the Batch Code on the Sentinel HL key matches the Batch Code of the protected application.

>Open the Windows Services window and check that Sentinel License Manager is running. Try using a different USB device in the port from which the Sentinel HL key was not accessible. Connect the Sentinel HL key to a different USB port. Disconnect all other USB devices from their respective ports. >Check if the USB port is functioning correctly. If there is no entry, you must install the drivers using one of the methods in the Sentinel LDK Installation Guide. If you are running Sentinel LDK on a Windows platform, check for an entry for Sentinel LDK in the Device Manager utility. >The required Sentinel HL key drivers are not installed. If the LED lights, the application should be able to access the key. Disconnect, then reconnect after a few seconds. >The key is not connected properly to the USB port. The protected application cannot find a Sentinel HL key.ĭoes the Sentinel HL key LED light up? If not, this could be for one of the following reasons: For additional information, see the Sentinel LDK Installation Guide. After the older drivers are removed, install the Sentinel HL drivers. For additional information, see the Sentinel HL key driver documentation. Are older Sentinel HL key drivers installed on the machine? Uninstall the older driver using the installer corresponding to the older driver version.

Pen drive detected but cannot be opened