Query errors are not displayed, but a black page instead!

[eluser]Isos[/eluser]
If I mess up any query in any model on the system, I get a sql query like Unknown column or table or any thing .. and it works fine expect for one page, when I call a specific functions from models with a wrong query it displays a blank page! WHY? is that a codeigniter bug? how can I track what's the error that prevents error report from appearing?

Thanks.

[eluser]Gordaen[/eluser]
What are your logs showing?

[eluser]Isos[/eluser]
I am not using logs now! Is there another way to understand what's happening with codeigniter not showing the errors?