Applying filter by certain dates to the contents of DeviceLock Enterprise Server's Server Log returns "DeviceLock - OnServerLogViewer error (120) - This function is not supported on this system."
Comments
This is a known issue fixed since DeviceLock 6.4.1.23535.
Recommendations
Upgrade to the latest version of DeviceLock (at least, to 6.4.1.23535).