From a00c2afaaf7e149a4d7b92e507c50e18c416316e Mon Sep 17 00:00:00 2001
From: Andreas Huber <andreas.huber@lawo.com>
Date: Tue, 24 Nov 2015 16:47:10 +0100
Subject: [PATCH] Closes #15

---
 Lawo.EmberPlusSharp/Model/IParameter.cs    |  2 ++
 Lawo.EmberPlusSharp/Model/ParameterBase.cs | 17 +++++++++++------
 2 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/Lawo.EmberPlusSharp/Model/IParameter.cs b/Lawo.EmberPlusSharp/Model/IParameter.cs
index 2a4291a4..712da28c 100644
--- a/Lawo.EmberPlusSharp/Model/IParameter.cs
+++ b/Lawo.EmberPlusSharp/Model/IParameter.cs
@@ -48,6 +48,8 @@ public interface IParameter : IElementWithSchemas
         object DefaultValue { get; }
 
         /// <summary>Gets <b>type</b>.</summary>
+        /// <exception cref="InvalidOperationException">The type is not available. This can only happen for a parameter
+        /// where <see cref="IElement.IsOnline"/> equals <c>false</c>.</exception>
         ParameterType Type { get; }
 
         /// <summary>Gets <b>streamIdentifier</b> (not yet supported).</summary>
diff --git a/Lawo.EmberPlusSharp/Model/ParameterBase.cs b/Lawo.EmberPlusSharp/Model/ParameterBase.cs
index 744b3384..6c0af205 100644
--- a/Lawo.EmberPlusSharp/Model/ParameterBase.cs
+++ b/Lawo.EmberPlusSharp/Model/ParameterBase.cs
@@ -375,14 +375,19 @@ private void SetFinalTytpe(ParameterType? valueType, ParameterType? enumType, Pa
             var finalType =
                 this.type ?? (typeType == ParameterType.Trigger ? typeType : null) ?? enumType ?? valueType ?? typeType;
 
-            if (!finalType.HasValue)
+            if (finalType.HasValue)
             {
-                const string Format =
-                    "No enumeration, enumMap, value or type field is available for the parameter with the path {0}.";
-                throw new ModelException(string.Format(CultureInfo.InvariantCulture, Format, this.GetPath()));
+                this.Type = finalType.Value;
+            }
+            else
+            {
+                if (this.IsOnline)
+                {
+                    const string Format =
+                        "No enumeration, enumMap, value or type field is available for the parameter with the path {0}.";
+                    throw new ModelException(string.Format(CultureInfo.InvariantCulture, Format, this.GetPath()));
+                }
             }
-
-            this.Type = finalType.Value;
         }
 
         private static List<KeyValuePair<string, int>> ReadEnumeration(EmberReader reader)