c# won't connect to multicast using Aeron.NET

Question

Is anyone familiar with Aeron.NET using c#? I'm trying to simply open a connection to a multicast and am not able to do so. I can successfully use netcat to see a transmission to the 'udp' address but it will not connect.

Code

using System;
using System.Threading;
using Adaptive.Aeron.LogBuffer;
using Adaptive.Agrona;
using Adaptive.Agrona.Concurrent;

namespace AeronTest
{
    class Program
    {
        public static void Main()
        {
        // aeron:udp?endpoint=224.9.10.11:12966
        // StreamId: 11


            const string channel = "aeron:udp?endpoint=224.9.10.11:12966";
            const int streamId = 11;

            var buffer = new UnsafeBuffer(new byte[256]);
            var handler = HandlerHelper.ToFragmentHandler(PrintMessage);

            try
            {
                using (var aeron = Adaptive.Aeron.Aeron.Connect())
                using (var publisher = aeron.AddPublication(channel, streamId))
                using (var subscriber = aeron.AddSubscription(channel, streamId))
                {
                    var message = buffer.PutStringWithoutLengthUtf8(0, "Hello World!");

                    publisher.Offer(buffer, 0, message);
                    Console.WriteLine("Message sent...");

                    while (subscriber.Poll(handler, 1) == 0)
                    {
                        Thread.Sleep(10);
                    }
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex);
            }
            finally
            {
                Console.WriteLine("Press any key to continue...");
                Console.ReadKey();
            }
        }

        private static void PrintMessage(IDirectBuffer buffer, int offset, int length, Header header)
        {
            var message = buffer.GetStringWithoutLengthUtf8(offset, length);

            Console.WriteLine($"Received message ({message}) to stream {header.StreamId:D} from session {header.SessionId:x} term id {header.TermId:x} term offset {header.TermOffset:D} ({length:D}@{offset:D})");
        }
    }
}

Error

Adaptive.Aeron.Exceptions.DriverTimeoutException: CnC file not created: C:\Users\user.name\AppData\Local\Temp\aeron-user.name\cnc.dat
   at Adaptive.Aeron.Aeron.Context.WaitForFileMapping(FileInfo cncFile, IEpochClock clock, Int64 deadLineMs)
   at Adaptive.Aeron.Aeron.Context.ConnectToDriver()
   at Adaptive.Aeron.Aeron.Context.Conclude()
   at Adaptive.Aeron.Aeron..ctor(Context ctx)
   at Adaptive.Aeron.Aeron.Connect(Context ctx)
   at Adaptive.Aeron.Aeron.Connect()
   at AeronTest.Program.Main() in C:\Users\user.name\source\repos\AeronTest\AeronTest\Program.cs:line 25
Press any key to continue...

Successful netcat Here you can see using netcat I can successfully transmit a packet to the n/w address

C:\Program Files (x86)\Nmap>ncat -v -u -z -w 3 224.9.10.11 12966

Ncat: Version 7.92 ( https://nmap.org/ncat )
Ncat: Connected to 224.9.10.11:12966.
Ncat: UDP packet sent successfully
Ncat: 1 bytes sent, 0 bytes received in 2.03 seconds.

thank you