diff --git a/AsbCloudApp/CyclycArray.cs b/AsbCloudApp/CyclycArray.cs
index f47edc5b..b551d1c2 100644
--- a/AsbCloudApp/CyclycArray.cs
+++ b/AsbCloudApp/CyclycArray.cs
@@ -1,5 +1,4 @@
-#nullable enable
-using System.Linq;
+using System.Linq;
 
 namespace System.Collections.Generic
 {
@@ -194,5 +193,4 @@ namespace System.Collections.Generic
             current = -1;
         }
     }
-}
-#nullable disable
\ No newline at end of file
+}
\ No newline at end of file
diff --git a/AsbCloudApp/Data/PlanFactBase.cs b/AsbCloudApp/Data/PlanFactBase.cs
index fc3dcff4..343156b4 100644
--- a/AsbCloudApp/Data/PlanFactBase.cs
+++ b/AsbCloudApp/Data/PlanFactBase.cs
@@ -9,11 +9,11 @@
         /// <summary>
         /// Плановое значение
         /// </summary>
-        public T Plan { get; set; }
+        public T? Plan { get; set; }
 
         /// <summary>
         /// Фактическое значение
         /// </summary>
-        public T Fact { get; set; }
+        public T? Fact { get; set; }
     }
 }
diff --git a/AsbCloudApp/Exceptions/ArgumentInvalidException.cs b/AsbCloudApp/Exceptions/ArgumentInvalidException.cs
index 2e70b871..b8014098 100644
--- a/AsbCloudApp/Exceptions/ArgumentInvalidException.cs
+++ b/AsbCloudApp/Exceptions/ArgumentInvalidException.cs
@@ -10,14 +10,14 @@ namespace AsbCloudApp.Exceptions
         /// <summary>
         /// название аргумента
         /// </summary>
-        public string ParamName { get; }
+        public string ParamName { get; } = string.Empty;
 
         /// <summary>
         /// конструктор
         /// </summary>
         /// <param name="message"></param>
         /// <param name="paramName"></param>
-        public ArgumentInvalidException(string message, string paramName = default)
+        public ArgumentInvalidException(string message, string paramName)
             : base(message)
         {
             ParamName = paramName;