Somone finally responded to my request for NWS help on the R mailing group. Turns out it was an inconsistent capitalization issue. Resolving this got it working fully on the Ubuntu machine, but only partially on the Cygwin machine. IE: I can now send commands and have them executed, but I can't get the values returned to the server. The only error I'm getting on the client machine is "No NWS server found;" which is odd because its the client and you'd think it doesn't need to have the server software running on it.