Stack Trace Error

error

        $contentService = $this->repo->getContentService();
        $location = $this->api->getLocationByPath( '/Date-and-Time-Test-Object' );
        $content = $this->api->getContentToUpdate( $location->contentInfo );
        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->contentInfo );

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