Fatal error: Call to undefined method

[eluser]Perkin5[/eluser]
I'm getting this response after calling a very simple method from the controller like this:

Code:

function fetchcode(){
$code = $this->Admin_model->get_code();
return $code;
}

The model method is:

Code:

function get_code(){
print_r('got this far');die();
$results = $this->db->get('price_cat');
$code = $results->result();
return $code;
}

I've got the model method primed to 'print_r die' when it is called but codeigniter tells me it's undefined. I know the Model is loaded as I'm successfully calling a number of other methods from the same model.

Any idea what's wrong?