Zend findDependentRowset An error occurred

I have three two classess

class Application_Model_Accounts extends Zend_Db_Table_Abstract
{
    protected $_name            = 'accounts';
    protected $_dependentTables = array('Application_Model_Bugs');
}

And

class Application_Model_Bugs extends Zend_Db_Table_Abstract
{
    protected $_name            = 'bugs';

    protected $_dependentTables = array('Application_Model_BugsProducts');

    protected $_referenceMap    = array(
        'Reporter' => array(
            'columns'           => 'reported_by',
            'refTableClass'     => 'Application_Model_Accounts',
            'refColumns'        => 'account_name'
        ),
        'Engineer' => array(
            'columns'           => 'assigned_to',
            'refTableClass'     => 'Application_Model_Accounts',
     开发者_如何转开发       'refColumns'        => 'account_name'
        ),
        'Verifier' => array(
            'columns'           => array('verified_by'),
            'refTableClass'     => 'Application_Model_Accounts',
            'refColumns'        => array('account_name')
        )
    );


}

in index controll i am trying to run this code.

public function indexAction()
    {

      $accountsTable = new Application_Model_Accounts();
      $accountsRowset = $accountsTable->find(1234);
      $user1234 = $accountsRowset->current();
      $bugsReportedByUser = $user1234->findDependentRowset('Application_Model_Bugs');
}

and on line

$bugsReportedByUser = $user1234->findDependentRowset('Application_Model_Bugs'); 

I am getting this error

An error occurred
Application error

I am unable to findout the problem. How to fix this problem. and is there a way to get more developer friendly error in Zend rather then just getting this message "An error occured".

I figure out the solution for this problem. in .Htaccess file enable the development mode by adding this line on top

SetEnv APPLICATION_ENV "development"  

This will show the complete error trace. Sorted

full working example of bugs code including db available here http://phphints.wordpress.com/2010/06/25/zend-framework-finddependentrowset-and-findparentrow-demo/