A socket operation was attempted to an unreachable host error

Question

I'm developing a program in C# that uses a UDP multicast system. My Multicast group it's using 224.0.0.1 address to communicate.

In all Windows 8 machines it is working fine. However, in a Win 7 64x machine the following error occurs:

A socket operation was attempted to an unreachable host.

Any suggestions what i have to do on the Win7 64x machine, to work?

I have already tried to check route table (on cmd prompt: route print). I saw that only 244.0.0 is being mapped and it works with 244.0.0.0. Thing is I want to use 244.0.0.1, since I only want to use the multicast in a local network.

When I try to make a route add command like this: route ADD 224.0.0.1 MASK 192.168.2.1 192.168.2.26 (or anything similar) it says:

The route addition failed: The parameter is incorrect.

Answer 1

Check out

Possible MSDN solution

You will have to translate the VB to C#, that should be trivial.