diff --git a/src/common/Dataset.cpp b/src/common/Dataset.cpp
index bbeba35..0af0bfa 100644
--- a/src/common/Dataset.cpp
+++ b/src/common/Dataset.cpp
@@ -187,12 +187,16 @@ namespace platform {
         }
         n_samples = Xv[0].size();
         n_features = Xv.size();
-        if (numericFeaturesIdx.at(0) == -1) {
-            numericFeatures = std::vector<bool>(n_features, true);
-        } else {
+        if (numericFeaturesIdx.size() == 0) {
             numericFeatures = std::vector<bool>(n_features, false);
-            for (auto i : numericFeaturesIdx) {
-                numericFeatures[i] = true;
+        } else {
+            if (numericFeaturesIdx.at(0) == -1) {
+                numericFeatures = std::vector<bool>(n_features, true);
+            } else {
+                numericFeatures = std::vector<bool>(n_features, false);
+                for (auto i : numericFeaturesIdx) {
+                    numericFeatures[i] = true;
+                }
             }
         }
         if (discretize) {
diff --git a/src/common/Datasets.cpp b/src/common/Datasets.cpp
index 535268e..e21d741 100644
--- a/src/common/Datasets.cpp
+++ b/src/common/Datasets.cpp
@@ -12,41 +12,51 @@ namespace platform {
         path = sd.getPath();
         ifstream catalog(path + "all.txt");
         std::vector<int> numericFeaturesIdx;
-        if (catalog.is_open()) {
-            std::string line;
-            while (getline(catalog, line)) {
-                if (line.empty() || line[0] == '#') {
-                    continue;
-                }
-                std::vector<std::string> tokens = split(line, ';');
-                std::string name = tokens[0];
-                std::string className;
-                numericFeaturesIdx.clear();
-                if (tokens.size() == 1) {
+        if (!catalog.is_open()) {
+            throw std::invalid_argument("Unable to open catalog file. [" + path + "all.txt" + "]");
+        }
+        std::string line;
+        while (getline(catalog, line)) {
+            if (line.empty() || line[0] == '#') {
+                continue;
+            }
+            std::vector<std::string> tokens = split(line, ';');
+            std::string name = tokens[0];
+            std::string className;
+            numericFeaturesIdx.clear();
+            int size = tokens.size();
+            switch (size) {
+                case 1:
                     className = "-1";
                     numericFeaturesIdx.push_back(-1);
-                } else {
+                    break;
+                case 2:
                     className = tokens[1];
-                    if (tokens.size() > 2) {
+                    numericFeaturesIdx.push_back(-1);
+                    break;
+                case 3:
+                    {
+                        className = tokens[1];
                         auto numericFeatures = tokens[2];
                         if (numericFeatures == "all") {
                             numericFeaturesIdx.push_back(-1);
                         } else {
-                            auto features = json::parse(numericFeatures);
-                            for (auto& f : features) {
-                                numericFeaturesIdx.push_back(f);
+                            if (numericFeatures != "none") {
+                                auto features = json::parse(numericFeatures);
+                                for (auto& f : features) {
+                                    numericFeaturesIdx.push_back(f);
+                                }
                             }
                         }
-                    } else {
-                        numericFeaturesIdx.push_back(-1);
                     }
-                }
-                datasets[name] = make_unique<Dataset>(path, name, className, discretize, fileType, numericFeaturesIdx);
+                    break;
+                default:
+                    throw std::invalid_argument("Invalid catalog file format.");
+
             }
-            catalog.close();
-        } else {
-            throw std::invalid_argument("Unable to open catalog file. [" + path + "all.txt" + "]");
+            datasets[name] = make_unique<Dataset>(path, name, className, discretize, fileType, numericFeaturesIdx);
         }
+        catalog.close();
     }
     std::vector<std::string> Datasets::getNames()
     {
diff --git a/src/common/DotEnv.h b/src/common/DotEnv.h
index 07cc921..c2c70b7 100644
--- a/src/common/DotEnv.h
+++ b/src/common/DotEnv.h
@@ -13,9 +13,30 @@ namespace platform {
     class DotEnv {
     private:
         std::map<std::string, std::string> env;
+        std::map<std::string, std::vector<std::string>> valid;
     public:
         DotEnv(bool create = false)
         {
+            valid =
+            {
+                {"source_data", {"Arff", "Tanveer", "Surcov"}},
+                {"experiment", {"discretiz", "odte", "covid"}},
+                {"fit_features", {"0", "1"}},
+                {"discretize", {"0", "1"}},
+                {"ignore_nan", {"0", "1"}},
+                {"stratified", {"0", "1"}},
+                {"score", {"accuracy"}},
+                {"framework", {"bulma", "bootstrap"}},
+                {"margin", {"0.1", "0.2", "0.3"}},
+                {"n_folds", {"5", "10"}},
+                {"discretiz_algo", {"mdlp", "bin3u", "bin3q"}},
+                {"platform", {"any"}},
+                {"model", {"any"}},
+                {"seeds", {"any"}},
+                {"nodes", {"any"}},
+                {"leaves", {"any"}},
+                {"depth", {"any"}},
+            };
             if (create) {
                 // For testing purposes
                 std::ofstream file(".env");
@@ -37,7 +58,39 @@ namespace platform {
                 std::istringstream iss(line);
                 std::string key, value;
                 if (std::getline(iss, key, '=') && std::getline(iss, value)) {
-                    env[trim(key)] = trim(value);
+                    key = trim(key);
+                    value = trim(value);
+                    parse(key, value);
+                    env[key] = value;
+                }
+            }
+            parseEnv();
+        }
+        void parse(const std::string& key, const std::string& value)
+        {
+            if (valid.find(key) == valid.end()) {
+                std::cerr << "Invalid key in .env: " << key << std::endl;
+                exit(1);
+            }
+            if (valid[key].front() == "any") {
+                return;
+            }
+            if (std::find(valid[key].begin(), valid[key].end(), value) == valid[key].end()) {
+                std::cerr << "Invalid value in .env: " << key << " = " << value << std::endl;
+                exit(1);
+            }
+        }
+        void parseEnv()
+        {
+            for (auto& [key, values] : valid) {
+                if (env.find(key) == env.end()) {
+                    std::string valid_values = "", sep = "";
+                    for (const auto& value : values) {
+                        valid_values += sep + value;
+                        sep = ", ";
+                    }
+                    std::cerr << "Key not found in .env: " << key << ", valid values: " << valid_values << std::endl;
+                    exit(1);
                 }
             }
         }