diff --git a/scripts/x.sh b/scripts/x.sh
index b3d58cc..7735967 100755
--- a/scripts/x.sh
+++ b/scripts/x.sh
@@ -15,16 +15,19 @@ function samples() {
                         ./target/release/kv_bench --path /home/abby/mace_bench --threads $i --iterations 100000 --mode insert --key-size ${kv_sz[j]} --value-size ${kv_sz[j+1]}
                         if test $? -ne 0
                         then
+                                echo "insert threads $i ksz ${kv_sz[j]} vsz ${kv_sz[j+1]} fail"
                                 exit 1
                         fi
                         ./target/release/kv_bench --path /home/abby/mace_bench --threads $i --iterations 100000 --mode get --key-size ${kv_sz[j]} --value-size ${kv_sz[j+1]}
                         if test $? -ne 0
                         then
+                                echo "insert threads $i ksz ${kv_sz[j]} vsz ${kv_sz[j+1]} fail"
                                 exit 1
                         fi
                         ./target/release/kv_bench --path /home/abby/mace_bench --threads $i --iterations 100000 --mode mixed --key-size ${kv_sz[j]} --value-size ${kv_sz[j+1]} --insert-ratio 30
                         if test $? -ne 0
                         then
+                                echo "insert threads $i ksz ${kv_sz[j]} vsz ${kv_sz[j+1]} fail"
                                 exit 1
                         fi
                 done