redirect loop error routing asp.net 4.0 webforms

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ASP.NET

WebForms

redirection

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Hi guys,
I am getting an error in a routed page when I click on a link that should open another routed link, but it seems that the code makes a loop I don't understand why and where.

Here the code in the global.asax

Sub RegisterRoutes(ByVal routeCollection As RouteCollection)
       RouteTable.Routes.RouteExistingFiles = false
       routeCollection.Ignore("{resource}.axd/{*pathInfo}")
       routeCollection.MapPageRoute("RouteHome", "", "~/home.aspx")

       routeCollection.MapPageRoute("RouteForpage", "search/{typology}/", "~/search-by-typology.aspx", False,
                                    New RouteValueDictionary(New With {.typology = ""}))



       routeCollection.MapPageRoute("RouteArticle", "search/{articlecode}/{id}/", "~/article.aspx")
End Sub

in the murkup(search-by-typology.aspx) I added the following code

<a href='<%# GetRouteUrl("RouteArticle", new With {.articlecode= eval("articlecodeDB").tostring(), .id = eval("idDB").tostring() })  %>'>	view details </a><br />

When I click on the link I get the redirection loop error, do you have any suggestion?

thank you