Installing sen2cor

I am trying to install the latest version of sen2cor (sen2cor-2.0.6) to run it on the new SNAP 2.0 software. I have done the installation with command line according to the instruction on the pdf, but each time when I try to call the operator with command line (L2A_Process–help) to make sure that the installation is successful I get this error massage on the command line:
I am working on windows 10, 64bit machine. Can anyone help me what this error means and how to fix it please. Thank you in advance.

I think you are missing space in your command.
Try: L2A_Process --help


Thank you Christian, you have solved my problem.


Can you please guide me about installation of sen2cor 2.0.6?