I tried two commands to load Str Module in OCaml top level. The first command gives me the error "Cannot find file Str.cmo". I then tried to use the file i was using in top level with the second command. With that command i got "Reference to undefined global Str". #load "Str.cmo";; #use "my_file.ml";; What do i need to do to successfully load Str module in OCaml top level.