How to get a multicast to wait for all nodes?

[Colin J. Williams]

Ryuke wrote:
> I have a code that receives gps information from nodes and gives off
> its own coordinates via radios connected by Ethernet.  but the code
> continues to run after receiving only 1 set of coordinates, how do i
> get it to wait for multiple nodes to send before continuing

You might provide wth significant part 
of the code you have written.

Colin W.