I keep getting the following error on my dotnetnuke installation and it is pretty consistent. At times when this happens all menus seems to disappear. It happens regularly everyday without fail. I have researched on internet and tried almost every single solution however nothing seems to work - including the famous query to update the desktopmodules table and setting the supportedfeatures to 0 where it is -1. I get the following everytime there is a application restart event. It happens in next 3 mints of application start event. CAN SOMEBODY PLEASE HELP? any or EVERY Help is very HIGHLY AND SINCERELY APPRECIATED. This is a PROD issue and I am afraid it will cause more harm as every day passes by.

AssemblyVersion: 04.08.00
PortalID: -1
PortalName:
UserID: -1
UserName:
ActiveTabID: -1
ActiveTabName:
RawURL: /default.aspx
AbsoluteURL: /default.aspx
AbsoluteURLReferrer:
UserAgent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727)
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: 794fa016-a9b3-48f1-9c8d-cb30c6c66af4
InnerException: Object reference not set to an instance of an object.
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: System.Collections.Generic.Dictionary`2.Insert
StackTrace:
Message: System.NullReferenceException: Object reference not set to an instance of an object. at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add) at DotNetNuke.Entities.Tabs.TabController.FillTabInfo(IDataReader dr, Boolean CheckForOpenDataReader, Boolean CheckForLegacyFields) at DotNetNuke.Entities.Tabs.TabController.FillTabInfoDictionary(IDataReader dr)
Source:
Server Name: SINGLE32

Sincerely,
Sid.

Same exact issue, been dealing with it for months. The website grinds to a halt and the pages begin to timeout. Proc usage on internet server from w3wp.exe bounces between 65% and 95% and the sqlserver.exe process on the database server pegs at 100%. A trace on sql sees hundreds of getTabPermissionByPortal being executed at the time when it happens.

DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: fb67d6e3-fc87-4c5e-99e0-9b1b466f5fa0
InnerException: Index was outside the bounds of the array.
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: System.Collections.Generic.Dictionary`2.Insert
StackTrace:
Message: System.IndexOutOfRangeException: Index was outside the bounds of the array. at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add) at DotNetNuke.Entities.Tabs.TabController.AddTabPathDictionary(Int32 portalId, String tabPath, Int32 tabId) at DotNetNuke.Entities.Tabs.TabController.FillTabInfo(IDataReader dr, Boolean CheckForOpenDataReader) at DotNetNuke.Entities.Tabs.TabController.FillTabInfoDictionary(IDataReader dr)

hi guys,

Its surprising that this has not been resolved particularly with the huge community that dotnetnuke has.  I too am facing this issue and again as Sid on Prod.  It occurs very randomly and now that someone pointed out, i guess it might after a application restart.  I will have monitor it further, but the good news is that this was discussed earlier on at http://www.dotnetnuke.com/Community/Forums/tabid/795/forumid/33/threadid/164437/scope/posts/Default.aspx, but there's no reason or solution mentioned there which would gurantee a solution.

Any help would be highly appreciated on this one...HELP!!  Its very tough explaining these errors and why they occurred!!  Below is the message that my application got

Index was outside the bounds of the array.