I don't understand what you are asking me

Are you suggesting my Network is slow ? overloaded ? defective ? or has some protocol error ?
I am connected by wire (not wireless)
The error always happens at the same time. It is not inconsistent. I suspect if it was congestion, the errror
would happen at different points in the process, not always at 'R' .
Is there a chance it could be a DRM issue ? That some track needs to get a licence online (grasping at straws here

The error occurs even if *only* two device the Serviio PC and the Sony TV are connected to the Network.
The HD in the Serviio server PC is a Seagate 1TB drive, virtually new and quite fast. It has been checked, defragged
and seems OK.
My network:
Vodafone HomeGateway model HG556A ( 802.11n )
Devices:
2 off PCs - wired
2 off PC - wireless
1 off Dell R15 laptop - wireless
1 off Patriot Box Office Media Player
1 off Sony BDP S350 Blu Ray player
1 off Sony KDL-32CX523
Can you clarify for me ?
Can I do any more tests ?
Would allowing the library access to log help ?
Note: it worked quite well with Win Media Server and Mezzmo , but I could not get thumbnails to display -> the main reason I'm trying Serviio and
also since Sony endorse it.
Regards
A.