Add warning message on `$a` when no component selected
Add warning message on `$a` when no component selected

rangle/augury,rangle/batarangle,rangle/augury,rangle/batarangle,rangle/augury,clbond/augury,clbond/augury,clbond/augury,rangle/batarangle,clbond/augury,rangle/batarangle,rangle/augury