diff --git a/src/utils.cpp b/src/utils.cpp
index b196d1c..5186526 100644
--- a/src/utils.cpp
+++ b/src/utils.cpp
@@ -25,9 +25,10 @@ void downloadWeightsifDoNotExist(const std::string& input_bin, const std::string
         std::string wget_cmd = "wget " + weights_url + " -O " + test_folder + "/weights.zip"; 
         std::string unzip_cmd = "unzip " + test_folder + "/weights.zip -d" + test_folder;
         std::string rm_cmd = "rm " + test_folder + "/weights.zip";
-        system(wget_cmd.c_str());
-        system(unzip_cmd.c_str());
-        system(rm_cmd.c_str());
+        int err = 0;
+        err = system(wget_cmd.c_str());
+        err = system(unzip_cmd.c_str());
+        err = system(rm_cmd.c_str());
     }
 }
 
diff --git a/tests/imuodom/imuodom.cpp b/tests/imuodom/imuodom.cpp
index 98ab1be..5c73786 100644
--- a/tests/imuodom/imuodom.cpp
+++ b/tests/imuodom/imuodom.cpp
@@ -77,6 +77,6 @@ int main() {
         out1 += ImuNet.odim1.tot();
     }
 
-    system("cat path.txt | gnuplot -p -e \"set datafile separator ' '; plot '-'\"");
+    int err = system("cat path.txt | gnuplot -p -e \"set datafile separator ' '; plot '-'\"");
     return ret_cudnn;
 }