hi everyone,

I´m using umbraco 4.6.1 and have blog 4 umbraco installed on my webmatrix solution. I have problems in Umbraco content backend. When I save a blogpost there is no problem but when I try to publish the blogpost I got the error shown below in umbraco backend. On the third time I tried to publish it worked fine.

Can anyone help me out here?

Server Error in '/' Application.
Object reference not set to an instance of an object.Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error: 

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace: 

[NullReferenceException: Object reference not set to an instance of an object.]
   umbraco.library.niceUrlJuno(Int32 nodeId, Int32 startNodeDepth, String currentDomain) +73
   umbraco.library.NiceUrlFetch(Int32 nodeID, Int32 startNodeDepth) +123
   umbraco.library.niceUrlDo(Int32 nodeID, Int32 startNodeDepth) +98
   umbraco.library.NiceUrlFullPath(Int32 nodeID) +9
   Umlaut.Umb.Blog.EventHandlers.Autoping.Document_AfterPublish(Document sender, PublishEventArgs e) +412
   umbraco.cms.businesslogic.web.Document.FireAfterPublish(PublishEventArgs e) +27
   umbraco.cms.businesslogic.web.Document.PublishWithResult(User u) +1520
   umbraco.cms.presentation.editContent.Publish(Object sender, EventArgs e) +236
   System.EventHandler.Invoke(Object sender, EventArgs e) +0
   umbraco.controls.ContentControl.savePublish(Object Sender, ImageClickEventArgs e) +46
   System.Web.UI.WebControls.ImageButton.OnClick(ImageClickEventArgs e) +115
   System.Web.UI.WebControls.ImageButton.RaisePostBackEvent(String eventArgument) +120
   System.Web.UI.WebControls.ImageButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
   System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
   System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +36
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5563








Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1