On 2016-05-25 17:14, Jeff Boyce wrote:
> Greetings -
> 
>      I recently converted a Win7 box to a Win10 box.  Ever since this
> change the Win10 box has failed to backup.  I have another Win7 box 
> with
> the same configuration for BackupPC as the Win10 box, except a 
> different
> user and password, and this Win7 box is still working. This indicates 
> to
> me that there was some change in the networking stuff of Win10 that has
> caused my problem, but I don't have a clue to what it might be.  I am
> running BackupPC 3.3.1 on a CentOS 6 box, using SMB as the transfer 
> method.
> 
> The config and error log for the broken Win10 box:
> /etc/BackupPC/pc/rdr-lat6540.pl
> $Conf{BackupFilesOnly} = {
>    'C' => [
>      '\\users\\robynr\\AppData\\Local\\Microsoft\\Windows Live Mail'
>    ]
> };
> $Conf{SmbSharePasswd} = 'xxxxxxxx';
> $Conf{SmbShareUserName} = 'robynr';
> $Conf{SmbShareName} = [
>    'C'
> ];
> 
> Host name resolution works.  Bacteria is the BackupPC box.
> [root@bacteria ~]# perl -e 'print(gethostbyname("rdr-lat6540") ? "ok/n"
> : "not found/n");'
> ok/n
> 
> Abbreviated Error Log
> 2016-05-25 14:12:36 full backup started for share C
> 2016-05-25 14:12:38 Got fatal error during xfer (tree connect failed:
> NT_STATUS_BAD_NETWORK_NAME)
> 2016-05-25 14:12:43 Backup aborted (tree connect failed:
> NT_STATUS_BAD_NETWORK_NAME)
> 
> Detailed Error Log
> Running: /usr/bin/smbclient \\\\rdr-lat6540\\C -U robynr -E -d 1 -c
> tarmode\ full -Tc - 
> \\users\\robynr\\AppData\\Local\\Microsoft\\Windows\
> Live\ Mail
> full backup started for share C
> Xfer PIDs are now 19313,19312
> Domain=[RDR-LAT6540] OS=[Windows 10 Pro 10586] Server=[Windows 10 Pro 
> 6.3]
> This backup will fail because: tree connect failed:
> NT_STATUS_BAD_NETWORK_NAME
> tree connect failed: NT_STATUS_BAD_NETWORK_NAME
> Domain=[RDR-LAT6540] OS=[Windows 10 Pro 10586] Server=[Windows 10 Pro 
> 6.3]
> tree connect failed: NT_STATUS_BAD_NETWORK_NAME
> tarExtract: Done: 0 errors, 0 filesExist, 0 sizeExist, 0 sizeExistComp,
> 0 filesTotal, 0 sizeTotal
> Got fatal error during xfer (tree connect failed:
> NT_STATUS_BAD_NETWORK_NAME)
> Backup aborted (tree connect failed: NT_STATUS_BAD_NETWORK_NAME)
> Not saving this as a partial backup since it has fewer files than the
> prior one (got 0 and 0 files versus 0)
> 
> I have been searching the mailing list archives and other sources 
> online
> for 2 days to try and diagnose this.  The error messages don't seem
> clear enough to me.  I have the exact same configuration on a Win7 box
> that is working.  The only possibility that I see online is reference 
> to
> the SMB protocols changing between Win7 and Win10 that has some issues
> with network discovery, but nothing specific to BackupPC.  Is there
> anyone that has BackupPC backing up Win10 clients that might be able to
> shed some light on this?
> 
> Please cc me directly as I only receive the daily digest of this list
> (which is more like once every couple weeks).  Thanks.
> 
> Jeff
> 
> --
> 
> Jeff Boyce
> Meridian Environmental

It must be said:  there are a lot of potential causes for 
NT_STATUS_BAD_NETWORK_NAME, so what solves one issue may not solve 
another.  However, I do recommend you start with the obvious thing that 
the error message is telling you, mainly that W10 does not have a share 
named C.

Perhaps simple sharing is turned on, perhaps the share name has been 
transliterated to something else.  You might want to try the 
troubleshooting step of listing the actual share names:

/usr/bin/smbclient -L //rdr-lat6540

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