diff --git a/ArmoredCar/ArmoredCar/ArmoredCarNotFoundException.cs b/ArmoredCar/ArmoredCar/ArmoredCarNotFoundException.cs
new file mode 100644
index 0000000..77c9bde
--- /dev/null
+++ b/ArmoredCar/ArmoredCar/ArmoredCarNotFoundException.cs
@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Runtime.Serialization;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ArmoredCar
+{
+    [Serializable]
+    internal class ArmoredCarNotFoundException : ApplicationException
+    {
+        public ArmoredCarNotFoundException(int i) : base($"Не найден объект по позиции{i}") { }
+        public ArmoredCarNotFoundException() : base() { }
+        public ArmoredCarNotFoundException(string message) : base(message) { }
+        public ArmoredCarNotFoundException(string message, Exception exception) :
+       base(message, exception)
+        { }
+        protected ArmoredCarNotFoundException(SerializationInfo info, StreamingContext
+       contex) : base(info, contex) { }
+    }
+}
diff --git a/ArmoredCar/ArmoredCar/FormMapWithSetArmoredCars.cs b/ArmoredCar/ArmoredCar/FormMapWithSetArmoredCars.cs
index c99cb31..3306a27 100644
--- a/ArmoredCar/ArmoredCar/FormMapWithSetArmoredCars.cs
+++ b/ArmoredCar/ArmoredCar/FormMapWithSetArmoredCars.cs
@@ -229,14 +229,15 @@ namespace ArmoredCar
         {
             if (saveFileDialog.ShowDialog() == DialogResult.OK)
             {
-                if (_mapsCollection.SaveData(saveFileDialog.FileName))
+                try
                 {
+                    _mapsCollection.SaveData(saveFileDialog.FileName);
                     MessageBox.Show("Сохранение прошло успешно", "Результат",
-                   MessageBoxButtons.OK, MessageBoxIcon.Information);
+                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                 }
-                else
+                catch (Exception ex)
                 {
-                    MessageBox.Show("Не сохранилось", "Результат",
+                    MessageBox.Show($"Не сохранилось: {ex.Message}", "Результат",
                    MessageBoxButtons.OK, MessageBoxIcon.Error);
                 }
             }
@@ -250,15 +251,16 @@ namespace ArmoredCar
         {
             if (openFileDialog.ShowDialog() == DialogResult.OK)
             {
-                if (_mapsCollection.LoadData(openFileDialog.FileName))
+                try
                 {
-                    MessageBox.Show("Загрузка прошла успешно", "Результат",
-                   MessageBoxButtons.OK, MessageBoxIcon.Information);
+                    _mapsCollection.LoadData(openFileDialog.FileName);
+                    MessageBox.Show("Загрузка прошла успешно", "Результат", 
+                        MessageBoxButtons.OK, MessageBoxIcon.Information);
                     ReloadMaps();
                 }
-                else
+                catch (Exception ex)
                 {
-                    MessageBox.Show("Не загрузилось", "Результат",
+                    MessageBox.Show($"Не загрузилось: {ex.Message}", "Результат",
                    MessageBoxButtons.OK, MessageBoxIcon.Error);
                 }
             }
diff --git a/ArmoredCar/ArmoredCar/MapsCollection.cs b/ArmoredCar/ArmoredCar/MapsCollection.cs
index 19195c8..63c2468 100644
--- a/ArmoredCar/ArmoredCar/MapsCollection.cs
+++ b/ArmoredCar/ArmoredCar/MapsCollection.cs
@@ -83,7 +83,7 @@ namespace ArmoredCar
         /// </summary>
         /// <param name="filename">Путь и имя файла</param>
         /// <returns></returns>
-        public bool SaveData(string filename)
+        public void SaveData(string filename)
         {
             if (File.Exists(filename))
             {
@@ -99,14 +99,13 @@ namespace ArmoredCar
                     sw.WriteLine($"{storage.Key}{separatorDict}{storage.Value.GetData(separatorDict, separatorData)}");
                 }
             }
-            return true;
         }
         /// <summary>
         /// Загрузка нформации по автомобилям на парковках из файла
         /// </summary>
         /// <param name="filename"></param>
         /// <returns></returns>
-        public bool LoadData(string filename)
+        public void LoadData(string filename)
         {
             if (!File.Exists(filename))
             {
@@ -138,8 +137,7 @@ namespace ArmoredCar
                     }
                     _mapStorages.Add(elem[0], new MapWithSetArmoredCarsGeneric<IDrawningObject, AbstractMap>(_pictureWidth, _pictureHeight, map));
                     _mapStorages[elem[0]].LoadData(elem[2].Split(separatorData, StringSplitOptions.RemoveEmptyEntries));
-                }
-                return true;
+                }               
             }
         }
     }
diff --git a/ArmoredCar/ArmoredCar/SetArmoredCarsGeneric.cs b/ArmoredCar/ArmoredCar/SetArmoredCarsGeneric.cs
index c24a911..bd7f915 100644
--- a/ArmoredCar/ArmoredCar/SetArmoredCarsGeneric.cs
+++ b/ArmoredCar/ArmoredCar/SetArmoredCarsGeneric.cs
@@ -33,10 +33,8 @@ namespace ArmoredCar
         /// <param name="armoredCar">Добавляемый автомобиль</param>
         /// <returns></returns>
         public int Insert(T armoredCar)
-        {   
-            if (Count < _maxCount)
-                return Insert(armoredCar, 0);
-            return -1;
+        {         
+            return Insert(armoredCar, 0);         
         }
         /// <summary>
         /// Добавление объекта в набор на конкретную позицию
@@ -46,6 +44,9 @@ namespace ArmoredCar
         /// <returns></returns>
         public int Insert(T armoredCar, int position)
         {
+            if (Count >= _maxCount)
+                throw new StorageOverflowException();
+
             if (position < 0 || position >= _maxCount)
                 return -1;
 
@@ -62,6 +63,8 @@ namespace ArmoredCar
             if (position < 0 ||  position >= Count)
                 return null;
             T armoredCar = _places[position];
+            if (armoredCar == null)
+                throw new ArmoredCarNotFoundException();
             _places.RemoveAt(position);
             return armoredCar;
         }
diff --git a/ArmoredCar/ArmoredCar/StorageOverflowException.cs b/ArmoredCar/ArmoredCar/StorageOverflowException.cs
new file mode 100644
index 0000000..7738cd4
--- /dev/null
+++ b/ArmoredCar/ArmoredCar/StorageOverflowException.cs
@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Runtime.Serialization;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ArmoredCar
+{
+
+    [Serializable]
+    internal class StorageOverflowException : ApplicationException
+    {
+        public StorageOverflowException(int count) : base($"В наборе превышено допустимое количество: {count}") { }
+        public StorageOverflowException() : base() { }
+        public StorageOverflowException(string message) : base(message) { }
+        public StorageOverflowException(string message, Exception exception) : base(message, exception) { }
+        protected StorageOverflowException(SerializationInfo info,StreamingContext contex) : base(info, contex) { }
+    }
+}