Sen2cor280

Thank you so much for asking all these questions. I am so sorry that I mentioned SNAP 7 in my post.
Actually it is SNAP 8.
I am a new user of sen2cor, just started yesterday. I have followed instruction to install sen2cor found in forum (link).

According to this instruction Atmospherically corrected output should be saved automatically with product name “2A”. But it is not happening in my case. It gives “Output product” and require to save.
Besides, the display execution output is showing some error and “finishing tool execution in 0 second”.
There was no error message.
I need to know that , is this “Output product” atmospherically corrected?
Is I am on the right way?