Couldn't copy the file - the request is not supported

[sludlow]

We have an incremental backup task that runs daily - it appears to be backing up new files, but is failing on modified files with this error:

Couldn't copy the file path\filename - the request is not supported

I've tried with volume shadow copy on and off

App is running on Windows Server 2012 Standard.

Any help/assistance with this error would be greatly appreciated.

[cobian]

What is the destination? A NAT drive?

[sludlow]

we have a separate BSD server with a mounted drive for backups - accessed over SMB from the Server 2016 machine which runs Cobian as a service. If it was an issue with destination, wouldn't it be failing for BOTH new files and modified files? As far as I can tell, it's only failing on modified files.

So, destination looks like:
\\10.x.x.x\backups\backupfolder

Was wondering if I need to upgrade to reflector? This server was upgraded from 2012 R2 to 2016 before Christmas - it may have broke then and I didn't notice as my periodic method for checking if the backup is working is to look for newly created files.

[cobian]

There is no difference in copting or replacing. The is is not allowing the replacement for some weird reason.

[cobian]

Read only partition perhaps? Just guessing.