DateInterval Error

Fatal error: Uncaught exception 'Exception' with message 'DateInterval::__construct() expects parameter 1 to be string, object given' in /var/www/intranet/wordpress/schedule_test/functions/functions.php:71 Stack trace: #0 /var/www/intranet/wordpress/schedule_test/functions/functions.php(71): DateInterval->__construct(Object(DateInterval)) #1 /var/www/intranet/wordpress/schedule_test/functions/functions.php(370): bld_php_report() #2 /var/www/intranet/wordpress/schedule_test/functions/run_proc.php(78): run_php_rpt() #3 /var/www/intranet/wordpress/schedule_test/index.php(17): include('/var/www/intran...') #4 {main} thrown in /var/www/intranet/wordpress/schedule_test/functions/functions.php on line 71