A crash on syntax editor

Hi,


I have embeded syntax editor 4.0.274.0 along with intelliprompt and intellisense on our application. While it is initialized or displayed, our applicaiton crashes and the following exception thrown. Does anyone know why?

Thanks
Yuenho


{"Index was out of range. Must be non-negative and less than the size of the collection.\r\nParameter name: index"}

" at System.Collections.ArrayList.get_Item(Int32 index)\r\n
at ActiproSoftware.SyntaxEditor.TextRangeLayerBase.GetTextRange(Int32index)\r\n
at ActiproSoftware.SyntaxEditor.SpanIndicatorLayer.get_Item(Int32 index)\r\n
at ActiproSoftware.SyntaxEditor.SpanIndicatorLayer.Clear()\r\n
at ActiproSoftware.SyntaxEditor.SpanIndicatorLayerCollection.Remove(SpanIndicatorLayerlayer)\r\n
at ActiproSoftware.SyntaxEditor.SyntaxLanguage.a(Document A_0)\r\n
at ActiproSoftware.SyntaxEditor.SyntaxLanguage.a(DocumentA_0,EventArgsA_1)\r\n
at ActiproSoftware.SyntaxEditor.Document.a(ISemanticParseDataA_0,TextRangeA_1,BooleanA_2,ObjectA_3)\r\n
at ActiproSoftware.SyntaxEditor.Document.ActiproSoftware.SyntaxEditor.ISemanticParseDataTarget.NotifySemanticParseComplete(SemanticParserServiceRequestrequest)\r\n
at ActiproSoftware.SyntaxEditor.SemanticParserService.a(SemanticParserServiceRequestA_0)\r\n at ActiproSoftware.SyntaxEditor.SemanticParserService.c()\r\n
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)\r\n
at System.Threading.ExecutionContext.Run(ExecutionContextexecutionContext,ContextCallbackcallback,Objectstate)\r\n
at System.Threading.ThreadHelper.ThreadStart()"