Hello,

I have a diagram that is being rendered to an image and that is working fine. I tried to convert it to a live diagram and found that the rendering process resulted in a null reference error:

[[NullReferenceException: Object reference not set to an instance of an object.]
   MindFusion.Diagramming.Mvc.x630bd14d2b59afbd.Serialize(Object obj, JavaScriptSerializer serializer) +998
   System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat, MemberInfo currentMember) +196
   System.Web.Script.Serialization.JavaScriptSerializer.SerializeEnumerable(IEnumer
able enumerable, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +194
   System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Obje
ct o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat, MemberInfo currentMember) +1922
   System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat, MemberInfo currentMember) +165
   System.Web.Script.Serialization.JavaScriptSerializer.SerializeDictionary(IDictio
nary o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) +671
   System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Obje
ct o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat, MemberInfo currentMember) +1857
   System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat, MemberInfo currentMember) +165
   System.Web.Script.Serialization.JavaScriptSerializer.Serialize(Object obj, StringBuilder output, SerializationFormat serializationFormat) +51
   System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat, MemberInfo currentMember) +320
   System.Web.Script.Serialization.JavaScriptSerializer.Serialize(Object obj, SerializationFormat serializationFormat) +113
   MindFusion.Diagramming.Mvc.DiagramViewExtensions.x5462b8fe5a6241c8(DiagramView xc42c7c2f5b14bb4d, String xeaf1b27180c0557b) +346]

After some investigation I found that this error is tied to use of the ArrowHeads.None link head shape. My diagram works when the following line is removed:

diagram.LinkHeadShape = ArrowHeads.None;

I have tried using a custom, empty shape and the diagram appears to ignore this setting and defaults to one of the standard arrows.

I am currently using version 1.3, which I purchased and downloaded last January and never updated. Is there a newer version that fixes this issue, that I could download under my previous 1 year upgrade license?

Is there a workaround to get the same effect as ArrowHeads.None?

Thanks,

Thanks. That worked.