Struckle with my model and the builder - "Call to a member function get() on null"

If you need to work with the query builder, you need to call the builder function, it’s not a variable:

PHP Code:

$builder = $this->builder(); 


See: http://codeigniter.com/user_guide/models...ry-builder

But in your case, you don’t need your getAll() function, just call the findAll() function:

PHP Code:

$this->data['epochen'] = $this->model->findAll(); 


See: http://codeigniter.com/user_guide/models...nding-data