diff --git a/Example/PNObject/PNObjectAppDelegate.m b/Example/PNObject/PNObjectAppDelegate.m
index 3f5c88d..01570c4 100644
--- a/Example/PNObject/PNObjectAppDelegate.m
+++ b/Example/PNObject/PNObjectAppDelegate.m
@@ -29,8 +29,12 @@
     PNUser *user = [PNUser currentUser];
     [user setFirstName:@"peppe"];
     [user setLastName:@"nucifora"];
+    [user setUsername:@"giuseppe.nucifora"];
     
-    NSLog(@"user : %@",[user getObject]);
+    
+    PNUser *object = [user saveLocally];
+    
+    NSLog(@"User : %@",[object getObject]);
     
     return YES;
 }
diff --git a/Example/Podfile b/Example/Podfile
index 29911ae..b542157 100644
--- a/Example/Podfile
+++ b/Example/Podfile
@@ -10,6 +10,8 @@ target 'PNObject_Example' do
     pod 'UIDevice-Utils'
     pod 'AFNetworking'
     pod 'nv-ios-http-status'
+    pod 'NSString-Helper'
+    pod 'CodFis-Helper'
 end
 
 target 'PNObject_Tests' do
diff --git a/PNObject.podspec b/PNObject.podspec
index 3974782..8d81489 100644
--- a/PNObject.podspec
+++ b/PNObject.podspec
@@ -40,5 +40,7 @@ s.dependency 'PEAR-FileManager-iOS'
 s.dependency 'NSDate_Utils'
 s.dependency 'UIDevice-Utils'
 s.dependency 'nv-ios-http-status'
+s.dependency 'NSString-Helper'
+s.dependency 'CodFis-Helper'
 
 end
diff --git a/Pod/Classes/PNObjectModel.m b/Pod/Classes/PNObjectModel.m
index b80f61b..20bfc3e 100644
--- a/Pod/Classes/PNObjectModel.m
+++ b/Pod/Classes/PNObjectModel.m
@@ -37,16 +37,29 @@ static bool isFirstAccess = YES;
 }
 
 - (NSString * _Nullable) objectName:(id _Nonnull) object {
-    NSString *className;
     
     BOOL isPNObjectSubclass = [[object class] isSubclassOfClass:[PNObject class]];
     
     if(isPNObjectSubclass) {
         
-        if ([[object class] conformsToProtocol:@protocol(PNObjectSubclassing)] && [(PNObject*)[object subClassDelegate] respondsToSelector:@selector(objectClassName)]) {
+        if ([[object class] conformsToProtocol:@protocol(PNObjectSubclassing)]) {
             
-            return className = (NSString *)[[(PNObject*)object class] performSelector:@selector(objectClassName)];
+            NSLogDebug(@"%@",[object subClassDelegate]);
             
+            //if ([[object subClassDelegate] respondsToSelector:@selector(objectClassName)]) {
+            
+            @try {
+                return (NSString *)[[object class] performSelector:@selector(objectClassName)];
+            }
+            @catch (NSException *exception) {
+                return nil;
+            }
+            @finally {
+                
+            }
+            
+            
+            //}
         }
     }
     return nil;
@@ -117,12 +130,10 @@ static bool isFirstAccess = YES;
         
         if ([[object class] conformsToProtocol:@protocol(PNObjectSubclassing)]) {
             
-            id value;
-            
             SEL selector = NSSelectorFromString(@"getObject");
             NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[[PNObject class] instanceMethodSignatureForSelector:selector]];
             [invocation setSelector:selector];
-            [invocation setTarget:value];
+            [invocation setTarget:object];
             [invocation invoke];
             
             NSDictionary *objectDict;
diff --git a/Pod/Classes/User/PNUser.m b/Pod/Classes/User/PNUser.m
index 92047ee..af1245f 100644
--- a/Pod/Classes/User/PNUser.m
+++ b/Pod/Classes/User/PNUser.m
@@ -71,9 +71,16 @@ static bool isFirstAccess = YES;
         [self doesNotRecognizeSelector:_cmd];
     }
     self = [super init];
+    if (self) {
+        [self setSubClassDelegate:self];
+    }
     return self;
 }
 
+- (void) setEmail:(NSString *)email {
+    
+}
+
 #pragma mark PNObjectSubclassing Protocol 
 
 + (NSDictionary *)objcetMapping {