GeneXus - Error Jayrock.JSON: Unterminated string.

Buen día,
Tengo una aplicación web desarrollada con GeneXus X Evo 2 U4 en C# compilada con Net Framework 3.5 que está registrando excepciones de la biblioteca Jayrock , utilizado por GeneXus.
En el ambiente de producción hemos identificado que esto sucede aleatoriamente y en distintos programas de la aplicación. Quiero solucionarlo pero no he podido reproducir el error ya que como menciono es aleatorio y en cualquier programa.
Encontré en http://www.gxopen.com/forumsr/servlet/viewthread?artech,2,183738 el mismo problema pero no sé a que se deba. A alguien le pasa lo mismo?

Exception information:
Exception type: ParseException
Exception message: Unterminated string.

Thread information:
Thread ID: 7
Thread account name: IIS APPPOOL\ClienteEvo2
Is impersonating: False
Stack trace: at Jayrock.Json.TextParser.NextString(Char quote)
at Jayrock.Json.JsonTextReader.Parse()
at Jayrock.Json.JsonTextReader.ParseNextMember()
at Jayrock.Json.JsonTextReader.ReadToken()
at Jayrock.Json.JsonReader.DeserializeNext(IParserOutput output)
at GeneXus.Http.HttpAjaxContext.GetGXStateTokens(String state)
at GeneXus.Http.HttpAjaxContext.LoadFormVars(HttpContext localHttpContext)
at GeneXus.Http.GXHttpHandler.InitPrivates()
at GeneXus.Http.GXHttpHandler.ProcessRequest(HttpContext httpContext)
at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

o

Exception information:
Exception type: ParseException
Exception message: Expected a ':' after a key.


Thread information:
Thread ID: 36
Thread account name: IIS APPPOOL\ClienteEvo2
Is impersonating: False
Stack trace: at Jayrock.Json.JsonTextReader.ParseObjectMemberValue()
at Jayrock.Json.JsonTextReader.ReadToken()
at Jayrock.Json.JsonReader.DeserializeNext(IParserOutput output)
at GeneXus.Http.HttpAjaxContext.GetGXStateTokens(String state)
at GeneXus.Http.HttpAjaxContext.LoadFormVars(HttpContext localHttpContext)
at GeneXus.Http.GXHttpHandler.InitPrivates()
at GeneXus.Http.GXHttpHandler.ProcessRequest(HttpContext httpContext)
at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

Gracias.

hola pudiste solucionar ese problema? igual presento el mismo error.


saludos.