When i am connected to an Windows Server 2008 R2 i quite frequently get this error.
Now when i am actually using the machine i am connected to, but so far only when i don't use it.
But i am also connected to a machine with Windows 8.1 on the same Hyper-V server, and it does not loose connection.

Ohh and yes the machines i connect to are all on the same Hyper-V Server, on a remote network, with a good connection.

Session Terminated Unexpectedly

Remote session was closed at 07-07-2014 13:21:38

Unknown disconnection code: 4 - An Internal error has occurred. - Please
report this to the RD Tabs developer.

So as i nice user, i have hereby done as i was told =d{

Hi, I just received the same error in a similar situation. Did you ever receive a reply?

thanks,
Ulysses

No i newer got an answer

Disconnection code 4 is basically just a new error code for session terminated unexpectedly. It's safe to ignore. It will be added to the next release.