Newbies question. CI error reporting - CI fails silently?

[eluser]searain[/eluser]
I set up error_reporting('E_ALL'); in index.php.

But when I have typo in the model, such as missing a ")", no error report shows, just empty page.

And when I call a method not exist in the model from controller, Such as by mistake I called $this->Article_categories_model->add_category(); instead of $this->Article_categories_model->add_article_category(); no error report shows, just empty page.

How can I deal with this fails silently issue?