Vim Returns "E764: Option 'omnifunc' is not set" When I Enter <ctrl-x> <ctrl-o>

[llee454]

Vim returns the following error message when I open an OCaml file (a file that ends in *.ml), type a string such as "Int." and press while in insert mode: "E764: Option 'omnifunc' is not set".

[voodoos]

Looks like a configuration problem ? Any VIM user around ? Maybe @julow ?

[Julow]

This looks like a installation problem. Are you using opam user-setup install ?

Check if the plugin is installed by typing :call merlin#Register(), it'll make an error if it isn't.