[HELP]Could not find main class:

i think this might be the right place to post this, if not i apologize.

i tried using rsbot a long time ago, every time i kept getting the error.
"could not find main class:"
and that kind of stuff whenever i tried to open up the .jar.
kbot does this, and so does robotzindisguise or w/e.

i've tried setting the class path with no avail.

would anyone be able to help me out?
>:O it's rather aggravating.


thank you.

 

im not sure man have you tried google?