But when put to a particular folder gives this error.

Ex: I put it to the Marketing folder back this error message when I try it in the client's Server is normal that folder.

thank you

I assume what you wish to say is following: your saveset is folder.  When you run this saveset from server you get this failure.  When you run it from client then it works just fine.  Is this correct?  If so, then as hinted earlier network is your issue.  network in this case is either:

a) timeout issue on idle connection (which exists for server initiated backups and usually it is seen after 60 minutes in default settings)

b) some other sort of network issue

Based on earlier experience I would say it is most likely a).  What happens with server initiated backups is that you have 2 connections; one used for data and one used for control.  Control one is active at the start of backup and end. In between it is idle.  Many network devices and mechanisms, keeping an eye on network connections, have default setting where if connection is idle for more than 60 minutes it will be killed.  And this is usually where you see this error happening.  In such cases you may workaround this by keeping session alive.  Backup software itself has something called NSR_KEEPALIVE_WAIT variable (which you set value below timeout).  I believe in the past if verbose flag was used for NSR group then you would achieve same effect.  On OS level, this sort of timeouts can be also manipulated.  Lastly, you can change this at level of firewall if in use.  Usually, you wish to change it backup application level and take it from there.  The variable itself is described in docs and you may find articles on it if you put it in search on PowerLink.