diff --git a/pytpcc/drivers/mongodbdriver.py b/pytpcc/drivers/mongodbdriver.py
index cd4dd32..b05678c 100644
--- a/pytpcc/drivers/mongodbdriver.py
+++ b/pytpcc/drivers/mongodbdriver.py
@@ -341,9 +341,8 @@ def loadConfig(self, config):
             logging.error("ServerSelectionTimeoutError %d (%s) when connected to %s: ",
                           exc.code, exc.details, display_uri)
             return
-        except pymongo.errors.ConnectionFailure:
-            logging.error("ConnectionFailure %d (%s) when connected to %s: ",
-                          exc.code, exc.details, display_uri)
+        except pymongo.errors.ConnectionFailure, err:
+            logging.error("ConnectionFailure (%s) when connected to %s: ", str(err), display_uri)
             return
         except pymongo.errors.PyMongoError, err:
             logging.error("Some general error (%s) when connected to %s: ", str(err), display_uri)
@@ -1150,6 +1149,10 @@ def save_result(self, result_doc):
         self.result_doc.update(result_doc)
         self.result_doc['after']=self.get_server_status()
         # saving test results and server statuses ('before' and 'after') into MongoDB as a single document
-        self.client.test.results.insert_one(self.result_doc)
+        try:
+           self.client.test.results.insert_one(self.result_doc)
+        except pymongo.errors.PyMongoError, err:
+           logging.error("An error (%s) occured during saving results into MongoDB", str(err))
+           print "An error (%s) occured during saving results into MongoDB" % str(err)
 
 ## CLASS
diff --git a/pytpcc/util/results.py b/pytpcc/util/results.py
index 6572494..d714cdd 100644
--- a/pytpcc/util/results.py
+++ b/pytpcc/util/results.py
@@ -238,7 +238,7 @@ def show(self, load_time=None, driver=None, threads=1):
                 ("with", "w/o ")[driver.no_transactions],
                 driver.warehouses,
                 round(txn_new_order*60/duration), txn_new_order, duration,
-                ("off", "on")[driver.batch_writes], total_retries, str(100.0*total_retries/total_cnt)[:5],
+                ("off", "on")[driver.batch_writes], total_retries, str(total_cnt and 100.0*total_retries/total_cnt)[:5],
                 ("w/o ", "with")[driver.find_and_modify],
                 driver.read_preference,
                 u"%6.2f" % (1000* lat[int(samples/2)]), u"%6.2f" % (1000*lat[int(samples/100.0*75)]),