Sequence contains no elements

I get this error when installing v 2.1.1 on Umbraco v 4.11.9

Server Error in '/' Application.

Sequence contains no elements

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.InvalidOperationException: Sequence contains no elements

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:


[InvalidOperationException: Sequence contains no elements]
   System.Linq.Enumerable.Single(IEnumerable`1 source) +371
   umbraco.BusinessLogic.ApplicationTreeRegistrar.<.ctor>b__0(Type x) +43
   System.Linq.WhereSelectListIterator`2.MoveNext() +232
   System.Linq.WhereSelectEnumerableIterator`2.MoveNext() +148
   System.Linq.<ConcatIterator>d__71`1.MoveNext() +643
   System.String.Join(String separator, IEnumerable`1 values) +341
   umbraco.BusinessLogic.ApplicationTreeRegistrar..ctor() +880
   umbraco.cms.businesslogic.packager.Installer.InstallBusinessLogic(Int32 packageId, String tempDir) +4713
   umbraco.presentation.developer.packages.Installer.ProcessInstall(String currentStep) +1161
   umbraco.presentation.developer.packages.Installer.Page_Load(Object sender, EventArgs e) +573
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +25
   umbraco.BasePages.BasePage.OnLoad(EventArgs e) +19
   System.Web.UI.Control.LoadRecursive() +71
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3064

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1008

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Stefan Kip 1606 posts 4098 karma points c-trib

Jul 12, 2013 @ 11:22

100

It's not a UrlTracker bug, but an Umbraco bug and has been resolved in newer versions: http://issues.umbraco.org/issue/U4-2379

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Michael Nielsen 82 posts 361 karma points

Jul 15, 2013 @ 11:48

0

Ok, but I only get the error when installing the URL Tracker package. Other packages installs fine...

Cannot upgrade due to using nForum on the site, so I'll have to live without the URL tracker on this site...

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Stefan Kip 1606 posts 4098 karma points c-trib

Jul 15, 2013 @ 11:49

0

You could also create a custom build by using the information from this comment: http://issues.umbraco.org/issue/U4-2379#comment=67-7958

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Michael Nielsen 82 posts 361 karma points

Jul 15, 2013 @ 11:55

0

My knowledge of .Net development is very limited, so I wouldn't know where or how to do that.

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