diff -urN udpcast-20011231sis2.orig/udpr-negotiate.c udpcast-20011231sis2/udpr-negotiate.c
--- udpcast-20011231sis2.orig/udpr-negotiate.c	2001-12-30 18:07:02.000000000 -0600
+++ udpcast-20011231sis2/udpr-negotiate.c	2003-11-06 10:05:27.000000000 -0600
@@ -1,3 +1,9 @@
+/*
+ * 2003.11.06   Brian E. Finley <finley@mcs.anl.gov>
+ *  - retrieve status returned by waitForProcess as "pipeStatus", then
+ *    exit with status of failed pipe program if status is non-zero.
+ */
+
 #include <fcntl.h>
 #include <unistd.h>
 #include <errno.h>
@@ -297,6 +303,8 @@
     {
 	struct fifo fifo;
 	void *returnValue;
+    int pipeStatus;
+
 	receiver_stats_t stats = allocReadStats(origOutFile);
 	
 	initFifo(&fifo, net_config->blockSize);
@@ -315,7 +323,11 @@
     
 	/* if we have a pipe, now wait for that too */
 	if(pipePid) {
-	    waitForProcess(pipePid, "Pipe");
+	    pipeStatus = waitForProcess(pipePid, "Pipe");
+        if(pipeStatus != 0) {
+            fsync(origOutFile);
+            exit(pipeStatus);
+        }
 	}
 	fsync(origOutFile);
 	displayReceiverStats(stats);