--- a/master/master.c	Mon Feb 12 10:39:52 2007 +0000
+++ b/master/master.c	Mon Feb 12 11:12:00 2007 +0000
@@ -1458,6 +1458,7 @@
     ecrt_master_send(master);
 
     while (1) { // active waiting
+        schedule(); // schedule other processes while waiting.
         ecrt_master_receive(master); // receive and dequeue datagrams
 
         // count number of datagrams still waiting for response