--- test_amber_parallel.sh.bak	2010-04-12 14:44:37.000000000 -0400
+++ test_amber_parallel.sh	2010-04-12 14:48:16.000000000 -0400
@@ -5,6 +5,12 @@
 	exit
 fi
 
+numprocs=`${DO_PARALLEL} echo "Testing number of processors" | wc -l`
+if [ "$numprocs" -eq 1 ] ; then
+	echo "Error: Parallel jobs on one CPU are not supported. Exiting."
+	exit
+fi
+
 date_string=`date +%Y-%m-%d_%H-%M-%S`
 logdir="logs/test_amber_parallel"
 logprefix="${logdir}/${date_string}"