diff --git a/app/controllers/myshixuns_controller.rb b/app/controllers/myshixuns_controller.rb
index 41b02f8ab..649516a03 100644
--- a/app/controllers/myshixuns_controller.rb
+++ b/app/controllers/myshixuns_controller.rb
@@ -130,8 +130,8 @@ class MyshixunsController < ApplicationController
 
             # is_public = test_sets.where(:position => j_test_set['caseId']).first.try(:is_public)
             logger.info "actual_output:################################################# #{actual_output}"
-            ts_time = format("%.2f",  j_test_set['testSetTime'].to_f/1000000000).to_f
-            ts_mem = format("%.2f",  j_test_set['testSetMem'].to_f/1024/1024).to_f
+            ts_time = format("%.2f",  j_test_set['testSetTime'].to_f/1000000000).to_f if j_test_set['testSetTime']
+            ts_mem = format("%.2f",  j_test_set['testSetMem'].to_f/1024/1024).to_f if j_test_set['testSetMem']
 
             Output.create!(:code => status, :game_id => game_id, :out_put => outPut, :test_set_position => j_test_set['caseId'],
                            :actual_output => actual_output, :result => j_test_set['passed'].to_i, :query_index => max_query_index,