Index: tests/RTT/Export.sh
===================================================================
--- tests/RTT/Export.sh	(revision 10520)
+++ tests/RTT/Export.sh	(revision 10521)
@@ -178,7 +178,7 @@
 	fi
 
 	# print error messages to the log
-	sed "s/^/[pcb-rnd:stderr]  /" < $res2
+	sed "s/^/[pcb-rnd:stderr]  /" < $res2 >&2
 	rm $res2
 
 	base=${fn%%.pcb}