Stack Trace Error

error.php

<?php

$content = $this->api->getContentToUpdate(
    $this->api->getContentInfoByPath( '/Date-and-Time-Test-Object' )
);

try {
    $newData = new DateTime( '31-09-2012 12:00 am' ); // 31-09-2012 12:00 am

    $content->setField( 'date_time', $newData );
    $this->api->saveContentUpdate( $content );

} catch (exception $e) {
    echo "Exception trying to add and invalid date and time \n";

    $newData = new DateTime( '30-09-2012 12:00 am' ); // 31-09-2012 12:00 am

    $content->setField( 'date_time', $newData );
    $this->api->saveContentUpdate( $content );      
}  
$this->api->clearViewCacheByPath( '/' ); // Workaround for bug #019637 : publicAPI : View cache is not cleared when making a new version of an object