diff --git a/src/Platform/Datasets.cc b/src/Platform/Datasets.cc
index fe04f41..717ccbc 100644
--- a/src/Platform/Datasets.cc
+++ b/src/Platform/Datasets.cc
@@ -16,11 +16,10 @@ namespace platform {
                 vector<string> tokens = Dataset::split(line, ',');
                 string name = tokens[0];
                 string className;
-                try {
-                    className = tokens[1];
-                }
-                catch (exception e) {
+                if (tokens.size() == 1) {
                     className = "-1";
+                } else {
+                    className = tokens[1];
                 }
                 datasets[name] = make_unique<Dataset>(path, name, className, discretize, fileType);
             }
diff --git a/src/Platform/DotEnv.h b/src/Platform/DotEnv.h
index 401d5af..c481310 100644
--- a/src/Platform/DotEnv.h
+++ b/src/Platform/DotEnv.h
@@ -43,7 +43,7 @@ namespace platform {
         }
         std::string get(const std::string& key)
         {
-            return env[key];
+            return env.at(key);
         }
         std::vector<int> getSeeds()
         {