Adding new item in SAP logon
when adding a new item in SAP GUI, we get an option for the connection type------
Custom application server
On selection the Group/Server selection
we need to add the System ID, Message server, SAP Router and Group/Server.
Here on adding the first two and then when i go on adding the Group/Server, I get the Error message as
Hostname <message server name> not found.
Is there anything i need to do in the HOST file or the Service file present at the Drivers folder of my local PC.