Undefined Function Error (undefined functions for argument of type 'double')

Hello all, I am creating a function to theoretically sort fruits. My function is:

    function [minionB, myA, myB] = divideFruit(minions, bags, crates)
    apples = bags / 20
    bananas = crates / 24
    minionB = bananas / minions
    myA = apples - minions
    myB = bananas - minions
    end

When I attempt to run the program by assigning numerical values to minions, bags and crates, I receive the message "Undefined function 'divideFruit' for input arguments of type 'double'."

What do I need to change in order to properly run my function? Thank You

[per isakson]

Read Create Functions in Files and What Is the MATLAB Search Path?

[Shaun]

Sounds like a path thing

Where I'm I?