why I get the error message like "Attempt to execute SCRIPT bar as a function"?

I am writing the code but in my MATLAB 2016, it's showing the error,

Answer 1

[John D'Errico]

Don't use existing function names as the names of your own scripts. If you do, then eventually you will get strange errors like this.

Do this in MATLAB:

which bar -all

It will show you where it finds a script by that name, defined by you. Rename that script, so something not already in use.

[Dyuman Joshi]

In OP's case, the live editor shows the location of the script, as observed in the screenshot attached.

Answer 2

[VBBV]

power_input = [-load -p_c] % this line uses builtin function load

[VBBV]

Change the above line since load is a built-in function and needs some input arguments when you call it in inside a bar function. Also, you probably might have named the script file with same name as bar function, then such error would appear. e.g. if the file name is bar.m