Index: System.Data.SQLite/SQLiteConvert.cs
==================================================================
--- System.Data.SQLite/SQLiteConvert.cs
+++ System.Data.SQLite/SQLiteConvert.cs
@@ -6,10 +6,15 @@
  ********************************************************/
 
 namespace System.Data.SQLite
 {
   using System;
+
+#if DEBUG
+  using System.Diagnostics;
+#endif
+
   using System.Runtime.InteropServices;
   using System.Collections.Generic;
   using System.Globalization;
   using System.Text;
 
@@ -692,11 +697,19 @@
       {
         if (_dbtypeNames[n].dataType == typ)
           return _dbtypeNames[n].typeName;
       }
 
-      return String.Empty;
+      string defaultTypeName = String.Empty;
+
+#if DEBUG
+      Trace.WriteLine(String.Format(
+          "WARNING: Type mapping failed, returning default name \"{0}\" for type {1}.",
+          defaultTypeName, typ));
+#endif
+
+      return defaultTypeName;
     }
 
     private static SQLiteTypeNames[] _dbtypeNames = {
       new SQLiteTypeNames("INTEGER", DbType.Int64),
       new SQLiteTypeNames("TINYINT", DbType.Byte),
@@ -878,11 +891,19 @@
         {
           return value.dataType;
         }
       }
 
-      return DbType.Object;
+      DbType defaultDbType = DbType.Object;
+
+#if DEBUG
+      Trace.WriteLine(String.Format(
+          "WARNING: Type mapping failed, returning default type {0} for name \"{1}\".",
+          defaultDbType, Name));
+#endif
+
+      return defaultDbType;
     }
     #endregion
 
     private static object _syncRoot = new object();
     private static Dictionary<string, SQLiteTypeNames> _typeNames = null;