Does your Run_Script script file define a variable named path on line 1, right before it tries to call the path function on line 2? [I suspect it does.] As long as that variable exists MATLAB cannot call the path function.
Changing the name of that variable would resolve the problem, but a script file trying to reinitialize the MATLAB search path as part of its execution smells kind of bad to me. Why is your script trying to do that?
