Brief Description of Issue - (fresh install vs. upgrade, browsers specific, user role, etc):
On upgrading a dnn 6.1.5 copy of a live site on LocalHost to 6.2RC I get the following error: (The upgrade reports succesfully completion but on the same page as "Upgrade Complete Click Here To Access Your Site" is the following)

Server Error in '/dotnetnuke' Application.

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Session state has created a session id, but cannot save it because the response was already flushed by the application.

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.Web.HttpException: Session state has created a session id, but cannot save it because the response was already flushed by the application.

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:

[HttpException (0x80004005): Session state has created a session id, but cannot save it because the response was already flushed by the application.] System.Web.SessionState.SessionIDManager.SaveSessionID(HttpContext context, String id, Boolean& redirected, Boolean& cookieAdded) +3691295 System.Web.SessionState.SessionStateModule.DelayedGetSessionId() +199 System.Web.SessionState.SessionStateModule.ReleaseStateGetSessionID() +25 System.Web.SessionState.SessionStateModule.OnReleaseState(Object source, EventArgs eventArgs) +874 System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +80

If I access the site it appears without any CSS formatting.

i have tried restoring the site and three or four attempts to upgrade all have failed.

What have i missed.

Thanks

Paul

Thanks for the reply Cathal.
I have I think turned off Session state. and changed to ALL in the log file.
While i no longer recieve the session state error, on accssing the site I still have no CSS and can not long on as the popup sign up does not appear.
I am using Nukeville skin Morpheus and am beginning to wonder if there is a clash here.
Paul

thanks for the update - dont worry about the localization issues, if a localization key is missing it defaults to the text with minimal overhead (we fix these in the core, but enabling ALL can reveal them in skins/modules). As to the issue, I dont know morpheus - you could try deleting it from relevant portal skins folder (check the bin folder as well in case it has an assembly) - the site will fall back to the default skin defined in dotnetnuke.config's skinningdefaults node, which by default is darkknight - if you dont have darkknight installed, change it to one that you did

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