The SFXCL command-line utility included with SecureFX for Windows is not intended to be used as a stand-alone utility. SFXCL is an automation tool designed to add command-line control of the GUI application. For example, in order to include a named session in a command-line argument, you must first configure and save that named session in the GUI application.
It is possible to configure SFXCL to run in stand-alone mode, but you must first install the entire application and then modify and/or create specific support files. Contact VanDyke Support if you wish to run SFXCL in this fashion.