Sitefinity failure to create new pages

Hi,

We cannot create new pages in our Sitefinity database. When attempting to do so a page does get created (with MVC widget content) however attempting to view the page triggers the error listed below:

[ArgumentNullException: Value cannot be null.

Parameter name: key]
   Telerik.Sitefinity.Web.SiteMapBase.FindSiteMapNodeFromKey(String key, Boolean ifAccessible) +196
   Telerik.Sitefinity.Web.PageSiteNodeCollection.UpdateNode(PageSiteNode& node) +319
   Telerik.Sitefinity.Web.PageSiteNodeCollection.get_Item(Int32 index) +108
   Telerik.Sitefinity.Web.InnerEnumerator.get_Current() +47
   Telerik.Sitefinity.Web.SiteMapBase.GetChildNode(PageSiteNode parent, String urlName) +297
   Telerik.Sitefinity.Web.SiteMapBase.ResolveNode(String[] segments, PageSiteNode parent, String expectedExtension, Int32 extensionSegmentIndex, Int32& regularNodesCount, String[]& additionalUrls) +142
   Telerik.Sitefinity.Web.SiteMapBase.FindSiteMapNode(String rawUrl, Boolean ifAccessible, Boolean unresolveUrl, Boolean& isAdditionalUrl, String[]& urlParameters) +1872
   Telerik.Sitefinity.Web.SitefinityRoute.FindSiteMapNode(String& virtualPath, SiteMapBase siteMapProvider, Boolean& isAdditional, String[]& pars, Boolean skipSubSiteCheck) +516
   Telerik.Sitefinity.Web.SitefinityRoute.GetRouteData(HttpContextBase httpContext) +291
   System.Web.Routing.RouteCollection.GetRouteData(HttpContextBase httpContext) +233
   System.Web.Routing.UrlRoutingModule.PostResolveRequestCache(HttpContextBase context) +60
   System.Web.Routing.UrlRoutingModule.OnApplicationPostResolveRequestCache(Object sender, EventArgs e) +82
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +136
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +69

Attempting to modify content or publish the page produces a popup alert stating:

"Value cannot be null.<br>Parameter name: key" or "Undefined".

We have attempted to add the maxPageNodes property with a large value in the web.config as listed below however it has no effect in resolving  the issue. 

<siteMap defaultProvider="SitefinitySiteMap">

  <providers>
    <add name="SitefinitySiteMap" type="Telerik.Sitefinity.Web.SitefinitySiteMap, Telerik.Sitefinity" taxonomyProvider="OpenAccessDataProvider" pageTaxonomy="Pages" rootNode="FrontendSiteMap" pageProvider="OpenAccessDataProvider" maxPageNodes ="500"/>
  </providers>
</siteMap>

We have also performed maintenance on the Sitefinity DB in order to defragment table indexes to no avail.

The issue is definitely related to reaching a page limit in Sitefinity since deleting existing pages and re-creating them resolves the issue until the point where a specific number of pages have been recreated without issue and then finally the next one fails. As stated prior the maxPageNodes has no effect is resolving this.  

We're using Sitefinity version 6.1.43.

Thanks,

Edward

When you create the page,  choose the option that does not automatically open the page in edit mode.

Hello Edward,

Can you please try to increase the value also in the backend (Administration > Settings > Advanced > Pages), Save the changes and restart the application. Increase the value to higher number e.g. 5000. 

You can refer to that KB article:
http://www.sitefinity.com/developer-network/knowledge-base/details/site-crashes-after-creating-a-new-page

Regards,
Svetoslav Manchev
Telerik