--- a/examples/udp-echo.cc	Sat Feb 28 16:25:24 2009 -0800
+++ b/examples/udp-echo.cc	Tue Mar 10 23:47:55 2009 -0700
@@ -127,7 +127,7 @@
 
   std::ofstream ascii;
   ascii.open ("udp-echo.tr");
-  CsmaHelper::EnablePcapAll ("udp-echo");
+  CsmaHelper::EnablePcapAll ("udp-echo", false);
   CsmaHelper::EnableAsciiAll (ascii);
 
 //