Delete Backup fail on 3.5.1

Hi,
When I try to delete an old backup (in admin mode) the following lines are displayed:

Warning: unlink(/…/htdocs/iPlife/Dolibarr/documents/admin/backup/backup/mysqldump_db321427965_3.5.0_201402051157.sql): No such file or directory in /…/htdocs/iPlife/Dolibarr/htdocs/core/lib/files.lib.php on line 775

Warning: Cannot modify header information - headers already sent by (output started at /…/htdocs/iPlife/Dolibarr/htdocs/core/lib/files.lib.php:775) in /…/htdocs/iPlife/Dolibarr/htdocs/main.inc.php on line 917

:happy:
SOLVED in 3.5.2

THanks