diff --git a/build/api/core/Request.php b/build/api/core/Request.php
index 2389d7e..ba2bf44 100755
--- a/build/api/core/Request.php
+++ b/build/api/core/Request.php
@@ -327,13 +327,24 @@
 				if( isset($config['rename']) && is_string($config['rename']) && preg_match('@^\w+$@', $config['rename']) )
 					$rename = $config['rename'];
 
-				/* (2) Gestion du paramètre DEFAULT */
+				/* (2) On récupère si le paramètre est optionnel ou pas */
+				$optional = isset($config['optional']) && $config['optional'] === true;
+
+				/* (3) Gestion du paramètre DEFAULT */
 				$default = null;
-				if( isset($config['default']) && is_string($config['default']) )
+
+				/* (3.1) Check if default NOT (NULL || FILE) -> matches TYPE */
+				if( isset($config['default']) ){
+
+					/* (3.1.1) Set default value from config */
 					$default = $config['default'];
 
-				/* (3) On récupère si le paramètre est optionnel ou pas */
-				$optional = isset($config['optional']) && $config['optional'] === true;
+					/* (3.1.2) If FILE and not null -> Check type */
+					if( $config['type'] != 'FILE' || $default != null  )
+						if( !Checker::run($config['type'], $default) )
+							return $this->error->set(Err::WrongDefaultParam, $rename, $config['type']);
+
+				}
 
 				/* (4) Si de type 'FILE' + fichier existe => on enregistre la ref. */
 				if( $config['type'] == 'FILE' && isset($_FILES[$name]) )
@@ -341,7 +352,7 @@
 
 				/* (4) Si param obligatoire et manquant -> erreur */
 				if( !isset($this->raw_params[$name]) && !$optional )
-					return $this->error->set(Err::MissingParam, $name);
+					return $this->error->set(Err::MissingParam, $rename);
 
 
 				/* (2.3) Gestion des valeurs
@@ -357,7 +368,7 @@
 
 					// Si la verification est fausse, on retourne faux
 					if( !Checker::run($config['type'], $this->raw_params[$name]) )
-						return $this->error->set(Err::WrongParam, $name, $config['type']);
+						return $this->error->set(Err::WrongParam, $rename, $config['type']);
 
 					// Sinon, on ajoute aux params qu'on enverra à l'appel
 					else
diff --git a/build/error/core/Err.php b/build/error/core/Err.php
index 720190b..d8077d9 100755
--- a/build/error/core/Err.php
+++ b/build/error/core/Err.php
@@ -61,10 +61,12 @@
 			const MissingParam        = 16;
 			/* (11) Paramètre incorrect */
 			const WrongParam          = 17;
-			/* (12) Erreur dans le traitement */
-			const ModuleError         = 18;
-			/* (13) URI Invalide */
-			const InvalidURI          = 19;
+			/* (12) Valeur par défaut incorrecte */
+			const WrongDefaultParam   = 18;
+			/* (13) Erreur dans le traitement */
+			const ModuleError         = 19;
+			/* (14) URI Invalide */
+			const InvalidURI          = 20;
 
 
 		/* [5] Database
@@ -72,50 +74,50 @@
 		/* (1) Base de données
 		---------------------------------------------------------*/
 			/* (1) Erreur lors de la creation d'un objet PDO (connection) */
-			const PDOConnection       = 20;
+			const PDOConnection       = 21;
 
 		/* (2) Repositories
 		---------------------------------------------------------*/
 			/* (1) Verification de la coherence du chemin (existe dans la conf) */
-			const WrongPathRepo       = 21;
+			const WrongPathRepo       = 22;
 
 			/* (2) Module non specifie dans la conf */
-			const UnknownRepo         = 22;
+			const UnknownRepo         = 23;
 
 			/* (3) Erreur dans le traitement */
-			const RepoError           = 23;
+			const RepoError           = 24;
 
 		/* (3) ORM
 		---------------------------------------------------------*/
 			/* (1) Table n'existe pas */
-			const UnknownTable        = 24;
+			const UnknownTable        = 25;
 			/* (2) Pas permissions de lire le schéma */
-			const NotAllowedSchema    = 25;
+			const NotAllowedSchema    = 26;
 
 
 		/* [6] Erreurs diverses
 		=========================================================*/
 
 			/* (1) Aucune donnée trouvée */
-			const NoMatchFound        = 26;
+			const NoMatchFound        = 27;
 
 			/* (2) Mauvais chemin de template */
-			const UnknownTemplate     = 27;
+			const UnknownTemplate     = 28;
 
 			/* (3) géolocalisation échouée */
-			const UnknownAddress      = 28;
+			const UnknownAddress      = 29;
 
 			/* (4) Erreur inconnue */
-			const UnknownError        = 29;
+			const UnknownError        = 30;
 
 			/* (5) Entrée existante */
-			const AlreadyExists       = 30;
+			const AlreadyExists       = 31;
 
 			/* (6) Corps manquant */
-			const MissingBody         = 31;
+			const MissingBody         = 32;
 
 			/* (7) Header manquant */
-			const MissingHeaders      = 32;
+			const MissingHeaders      = 33;
 	}
 
 ?>
diff --git a/build/error/core/Error.php b/build/error/core/Error.php
index 8f597ff..70cdc65 100755
--- a/build/error/core/Error.php
+++ b/build/error/core/Error.php
@@ -74,9 +74,10 @@
 				case Err::UncallableModule:    return $this->UncallableModule();    break;
 				case Err::UncallableMethod:    return $this->UncallableMethod();    break;
 				case Err::UnknownHttpMethod:   return $this->UnknownHttpMethod();   break;
-				case Err::ConfigError:         return $this->ConfigError();        break;
+				case Err::ConfigError:         return $this->ConfigError();         break;
 				case Err::MissingParam:        return $this->MissingParam();        break;
 				case Err::WrongParam:          return $this->WrongParam();          break;
+				case Err::WrongDefaultParam:   return $this->WrongDefaultParam();   break;
 				case Err::ModuleError:         return $this->ModuleError();         break;
 				case Err::InvalidURI:          return $this->InvalidURI();          break;
 				case Err::PDOConnection:       return $this->PDOConnection();       break;
@@ -161,6 +162,14 @@
 					return 'wrong param \''.$this->arguments[0].'\'';
 			else
 				return 'wrong param';
+		}private function WrongDefaultParam(){
+			if(	count($this->arguments) > 0 )
+				if(	count($this->arguments) > 1 )
+					return 'wrong default param \''.$this->arguments[0].'\' expected to be of type \''.$this->arguments[1].'\'';
+				else
+					return 'wrong default param \''.$this->arguments[0].'\'';
+			else
+				return 'wrong default param';
 		}private function ModuleError(){
 			if(	count($this->arguments) > 0 )
 				return 'module error: \''.$this->arguments[0].'\'';
diff --git a/config/modules.json b/config/modules.json
index de152cf..26339ba 100755
--- a/config/modules.json
+++ b/config/modules.json
@@ -3,7 +3,7 @@
 		"description": "Returns the API documentation",
 		"permissions": [],
 		"parameters": {
-			"URL0": { "description": "Name of the project to release", "type": "alphanumeric", "rename": "var1", "optional": true, "default": "default_value" }
+			"URL0": { "description": "Method name", "type": "varchar(1,30)", "rename": "method_name", "optional": true, "default": null, "default": null }
 		}
 	},