I am having a problem trying to read a value from an OPC Server (TOP Server). I am sure that my endpoint descriptor that I am using is correct because it returns multiple nodes when I use EasyUAClient.BrowseDataNodes. When I run the follwing code:

EasyUAClient easyUAClient = new EasyUAClient();
var nodes = easyUAClient.BrowseDataNodes("opc.tcp://DevSSS.ccrtest.ccr:49380", "nsu =TOP Server;s=TESTPLC1.TESTPLC1");
foreach (var node in nodes)
{
Console.WriteLine(node);
}

BodyStyle -> nsu=TOP%20Server ;ns=2;s=TESTPLC1.TESTPLC1.BodyStyle (Variable)
CarrierNumber -> nsu=TOP%20Server ;ns=2;s=TESTPLC1.TESTPLC1.CarrierNumber (Variable)
ColorCode -> nsu=TOP%20Server ;ns=2;s=TESTPLC1.TESTPLC1.ColorCode (Variable)
D0004520 -> nsu=TOP%20Server ;ns=2;s=TESTPLC1.TESTPLC1.D0004520 (Variable)

I am then trying to read a value from one of the nodes that was found using and receiving this error:

OpcLabs.EasyOpc.UA.UAStatusCodeException: Status is not good: {BadNodeIdUnknown}. The node id refers to a node that does not exist in the server address space.
+ The node descriptor used was: NodeId="nsu=TOP%20Server ;ns=2;s=TESTPLC1.TESTPLC1.CarrierNumber".
+ The client method called (or event/callback invoked) was 'ReadMultiple'.