Problem with DR file

Hi,

I have a server file under Win2008 and data are saved everyday with LTO tape drive and Backup exec 2012.

DR file for recovery are save on path by default C:\Program Files\Symantec\backup exe\sdr\data and on a second path on another computer \\srv\folder$

Everything is work perfectly but since few days, DR files is no longer create on his folder. I have an old DR file of 28 January 2015 but the new DR file does not appear on either the first or the second path.

I don't understand, backup are completed and successful, no error messages Have you an idea ?