[Samba] usershare

[Pascal Legrand]

Hello,
  i' got some strange message in samb log file :
Sep  9 15:04:10 samba smbd[1018]: [2013/09/09 15:04:10.621264,  0] 
param/loadparm.c:9114(process_usershare_file)
Sep  9 15:04:10 samba smbd[1018]:   process_usershare_file: stat of 
/var/lib/samba/usershares/blabla failed. Permission non accordée

But i havent usershares defined.
Somebody could told me what could be the way to solve this problem.
Is there a way to detect where these messages come from ?

thank you for your help

-- 
*Pascal*