title: calling a function from another script
body: <p>I want to use a function from one script in another script but i either get an erorr or nothing is happend, depend on my code syntax. When i use the <code>source("file_name)</code> i get an erorr, and when i add the <code>if(exists("function_name", mode = "function"))</code> i get nothing..</p>
  
  <p>hope you can help
  have a good day
  Or</p>