diff --git a/tools/do_manual_cover.sh b/tools/do_manual_cover.sh
index 3c237ac84c296beb98d39afc1826ad4b9067d302..5dcec5f46463f845f9fd2fc7772be5f6d97abbec 100755
--- a/tools/do_manual_cover.sh
+++ b/tools/do_manual_cover.sh
@@ -20,13 +20,17 @@ if [ -f $MANUAL_TEST_SCRIPT ]; then
 	echo "$MANUAL_COV_SCRIPT $ORIG_BIN $MANUAL_TEST_SCRIPT $AGGREGATE_COVERAGE"
 
 	eval $MANUAL_COV_SCRIPT $ORIG_BIN $MANUAL_TEST_SCRIPT $AGGREGATE_COVERAGE
-
-	
+	return $?
 fi
 
+#the remainder of this file is for Anh's old manual tests
+#which I will keep around for now, but ignore this code. 
+
+return 0
+
 ls $MANUAL_TEST_DIR/* >/dev/null 2>/dev/null
 if [ ! $? -eq 0 ]; then
-  echo "do_manual_cover.sh: error: no manual test specifications found -- exiting"
+  echo "do_manual_cover.sh: no manual test specifications found -- exiting"
   exit 1
 fi
 
diff --git a/tools/do_p1transform.sh b/tools/do_p1transform.sh
index 0f69684fdd3446c091f5edbfe74dfd3daec58d9e..2f6265abd72be61fd155b80f0d33854f9f018b5f 100755
--- a/tools/do_p1transform.sh
+++ b/tools/do_p1transform.sh
@@ -67,16 +67,20 @@ mkdir $P1_DIR
 #  fi
 #fi
 
+touch $EXECUTED_ADDRESSES_FINAL
+
 # generate coverage info for manually-specified tests (if any)
 $PEASOUP_HOME/tools/do_manual_cover.sh
 
+if [[ ! $? -eq 0 ]]; then
+	echo "ERROR: Manual coverage failed"
+	#continue for now, but don't encorporate manual coverage data. 
+else
+# merge all execution traces if successfully run
+	cat $EXECUTED_ADDRESSES_MANUAL >> $EXECUTED_ADDRESSES_FINAL
+fi
 echo "manual cover finished"
 
-# merge all execution traces
-touch $EXECUTED_ADDRESSES_FINAL
-
-cat $EXECUTED_ADDRESSES_MANUAL >> $EXECUTED_ADDRESSES_FINAL
-
 echo "Replaying all .json files"
 input_cnt=0
 REPLAY_DEADLINE=$(( `date +'%s'` + $COVERAGE_REPLAY_TIMEOUT ))
diff --git a/tools/manual_coverage_wrapper.sh b/tools/manual_coverage_wrapper.sh
index 09b91adcd73ad09928c494da32037ad587514a0c..91e6dc57e9f384e0e18d633bdebdd9bbd75267b9 100755
--- a/tools/manual_coverage_wrapper.sh
+++ b/tools/manual_coverage_wrapper.sh
@@ -8,7 +8,8 @@
 BENCH=$1
 TEST_SCRIPT=$2
 MANUAL_EXE_ADDRESS_OUTPUT_FILE=$3
-
+#A coverage round that takes longer than 10 minutes is assumed to be an infinite loop.
+TIMEOUT_VALUE=600
 
 PIN_BENCH=`pwd`/pin_bench
 COVERAGE_RESULTS_FILE=$PEASOUP_HOME/coverage_results/itrace.out
@@ -33,11 +34,13 @@ eval $TEST_SCRIPT -i $PIN_BENCH $BENCH
 #because I now have an ignore flag, this likely won't occur, but just in case.
 if [ $? -ne 0 ]; then
 
-	echo "WARNING: manual coverage failed. The running  manual tests reported failure with coverage instrumentation. Continuing with coverage that was collected."
+	echo "ERROR: manual coverage failed. The running  manual tests reported failure with coverage instrumentation. Ignoring coverage results."
+
+	exit 1
 fi
 
 # sanity filter, keep only well formed addresses
-cat $COVERAGE_RESULTS_FILE | sed 's/.*\(0x.*\)/\1/' >tmp
+cat $COVERAGE_RESULTS_FILE | sed 's/\(.*0x.*\)/\1/' >tmp
 mv tmp $COVERAGE_RESULTS_FILE
 
 cp $COVERAGE_RESULTS_FILE $MANUAL_EXE_ADDRESS_OUTPUT_FILE