diff --git a/MTC_Adapter/MTC_Adapter/AdapterGeneric.cs b/MTC_Adapter/MTC_Adapter/AdapterGeneric.cs
index c72908a..d5e126e 100644
--- a/MTC_Adapter/MTC_Adapter/AdapterGeneric.cs
+++ b/MTC_Adapter/MTC_Adapter/AdapterGeneric.cs
@@ -2397,7 +2397,14 @@ namespace MTC_Adapter
         /// <returns></returns>
         private uint getStoredValUInt(string keyVal)
         {
-            return Convert.ToUInt32(getStoredVal(keyVal));
+            uint answ = 0;
+            try
+            {
+                answ = Convert.ToUInt32(getStoredVal(keyVal));
+            }
+            catch
+            { }
+            return answ;
         }
         /// <summary>
         /// recupera valore salvato in persistence layer (se non c'è crea...) come INT
@@ -2406,7 +2413,14 @@ namespace MTC_Adapter
         /// <returns></returns>
         private long getStoredValLong(string keyVal)
         {
-            return Convert.ToInt64(getStoredVal(keyVal));
+            long answ = 0;
+            try
+            {
+                answ = Convert.ToInt64(getStoredVal(keyVal));
+            }
+            catch
+            { }
+            return answ;
         }
         /// <summary>
         /// recupera valore salvato in persistence layer (se non c'è crea...) come double
@@ -2415,7 +2429,14 @@ namespace MTC_Adapter
         /// <returns></returns>
         private double getStoredValDouble(string keyVal)
         {
-            return Convert.ToDouble(getStoredVal(keyVal));
+            double answ = 0;
+            try
+            {
+                answ = Convert.ToDouble(getStoredVal(keyVal));
+            }
+            catch
+            { }
+            return answ;
         }
 
         /// <summary>