Hi folks, hi Tom I found the problem. Originally I did a 'chmod -R 1777 root:root /home'. This prevents users other than owner to delete files on the subdirs like my "condivisione" (see smb.inf below). Because the saving operation of autoCAD .dwg files involves several steps of create-rename-delete temporary file before save THE .dwg file, permissions "1777" avoid the last deleting operation: the file belongs to an other user. A simple 'chmod -R 777 root:root /home' make all works fine. Note that in my implementation /home contains the share not the login user home directories. No user log on the AD controller These directives in smb.conf seem not to work: create mask = 0777 directory mask = 0777 force create mode = 0777 force directory mode = 0777 or - more probably - I mistake somewhere....;-) Giovanni ----- Original Message ----- From: Tom Jermy To: Info Cambria Sent: Wednesday, February 12, 2014 10:49 AM Subject: Re: [Samba] Problem saving AutoCAD files Hi, Did you manage to solve this? I am planning on implementing a samba 4 AD file sharing set up for my organisation & dwgs are a big part of what we do! Thanks On 7 February 2014 12:57, Info Cambria <info at cambria.it> wrote: Hi all, on my organization I have, on CentOS 6.5 x86_64, Samba 4.1.4 compiled and installed from source tarball. Samba acts as AD and fileserver. The problem is when the users try to save AutoCAD files on a share where all domain users have R+W rights. Autocad refuses to save a file formerly saved by another domain user. The message is: "AutoCAD unable to save drawing as it is being accessed by another session". Obviously, this is false: there is no other session accessing the file. By the way, other kind of file, like Word, Excel, PDF, etc. don't show this issue. My smb.conf:: # Global parameters [global] workgroup = MYORG realm = MYORG.LOCAL netbios name = FILESERVER server role = active directory domain controller dns forwarder = 8.8.8.8 [netlogon] path = /usr/local/samba/var/locks/sysvol/myorg.local/scripts read only = No [sysvol] path = /usr/local/samba/var/locks/sysvol read only = No # common share [condivisa] # this is the share where I have problems with AutoCAD files path = /home/condivisione read only = no create mask = 0777 directory mask = 0777 force create mode = 0777 force directory mode = 0777 # user share [j.smith] path = /home/j.smith read only = no [t.hill] path = /home/t.hill read only = no [l.dicaprio] path = /home/l.dicaprio read only = no Any ideas? Thanks in advance and sorry for my english :-) Giovanni