Due to an error elsewhere (one of my scripts) the directory /var/lib/samba/sysvol/samdom.com/Policies was removed. Then (without being aware of that issue) I ran samba-tool ntacl sysvolcheck (and also tried sysvolreset). Both crash hard: root@server:/var/lib/samba/sysvol# samba-tool ntacl sysvolreset Could not find opname rename, logging all Could not find opname rename, logging all Could not find opname rename, logging all Could not find opname rename, logging all Could not find opname rename, logging all Could not find opname rename, logging all Could not find opname rename, logging all Could not find opname rename, logging all Could not find opname rename, logging all Could not find opname rename, logging all Could not find opname rename, logging all Could not find opname rename, logging all Could not find opname rename, logging all Could not find opname rename, logging all set_nt_acl_conn: init_files_struct failed: NT_STATUS_OBJECT_NAME_NOT_FOUND ERROR(runtime): uncaught exception - (3221225524, 'The object name is not found.') File "/usr/lib/python3/dist-packages/samba/netcmd/__init__.py", line 186, in _run return self.run(*args, **kwargs) File "/usr/lib/python3/dist-packages/samba/netcmd/ntacl.py", line 412, in run provision.setsysvolacl(samdb, netlogon, sysvol, File "/usr/lib/python3/dist-packages/samba/provision/__init__.py", line 1754, in setsysvolacl set_gpos_acl(sysvol, dnsdomain, domainsid, domaindn, samdb, lp, use_ntvfs, passdb=s4_passdb) File "/usr/lib/python3/dist-packages/samba/provision/__init__.py", line 1630, in set_gpos_acl setntacl(lp, root_policy_path, POLICIES_ACL, str(domainsid), session_info, File "/usr/lib/python3/dist-packages/samba/ntacls.py", line 228, in setntacl smbd.set_nt_acl( root@sserver:/var/lib/samba/sysvol# samba-tool ntacl sysvolcheck ERROR(<class 'TypeError'>): uncaught exception - (2, 'No such file or directory') File "/usr/lib/python3/dist-packages/samba/netcmd/__init__.py", line 186, in _run return self.run(*args, **kwargs) File "/usr/lib/python3/dist-packages/samba/netcmd/ntacl.py", line 443, in run provision.checksysvolacl(samdb, netlogon, sysvol, File "/usr/lib/python3/dist-packages/samba/provision/__init__.py", line 1876, in checksysvolacl check_gpos_acl(sysvol, dnsdomain, domainsid, domaindn, samdb, lp, File "/usr/lib/python3/dist-packages/samba/provision/__init__.py", line 1811, in check_gpos_acl fsacl = getntacl(lp, root_policy_path, session_info, File "/usr/lib/python3/dist-packages/samba/ntacls.py", line 112, in getntacl attribute = samba.xattr_native.wrap_getxattr(file, Since the errors are not very clear on what it is missing, I used strace to find the culprit, an except of the output: getxattr("/var/lib/samba/sysvol/samdom.com", "security.NTACL", NULL, 0) = 320 getxattr("/var/lib/samba/sysvol/samdom.com", "security.NTACL", "\4\0\4\0\0\0\2\0\4\0\2\0\1\0002\301T\16\323Xi\312\203H\326\227\201\300n\0310\237"..., 320) = 320 getxattr("/var/lib/samba/sysvol/samdom.com/scripts", "security.NTACL", NULL, 0) = 320 getxattr("/var/lib/samba/sysvol/samdom.com/scripts", "security.NTACL", "\4\0\4\0\0\0\2\0\4\0\2\0\1\0002\301T\16\323Xi\312\203H\326\227\201\300n\0310\237"..., 320) = 320 getxattr("/var/lib/samba/sysvol/samdom.com/Policies", "security.NTACL", NULL, 0) = -1 ENOENT (No such file or directory) write(2, "ERROR(<class 'TypeError'>): unca"..., 82ERROR(<class 'TypeError'>): uncaught exception - (2, 'No such file or directory') ) = 82 stat("/usr/lib/python3/dist-packages/samba/netcmd/__init__.py", {st_mode=S_IFREG|0644, st_size=9885, ...}) = 0 openat(AT_FDCWD, "/usr/lib/python3/dist-packages/samba/netcmd/__init__.py", O_RDONLY|O_CLOEXEC) = 14 fstat(14, {st_mode=S_IFREG|0644, st_size=9885, ...}) = 0 ioctl(14, TCGETS, 0x7fff9ce59290) = -1 ENOTTY (Inappropriate ioctl for device) lseek(14, 0, SEEK_CUR) = 0 read(14, "# Unix SMB/CIFS implementation.\n"..., 4096) = 4096 read(14, "ROR: %s\\n\" % (message))\n "..., 8192) = 5789 read(14, "", 8192) = 0 close(14) = 0 Would it be feasible to catch the error and produce an error message in situation? - Kees