Hi. I've recently experienced a problem with my Mojoportal installation in that whenever I try to login I get an error. When checking the error log (via FTP) I see the following error (IP's / Domains hashed out...):

2015-02-08 22:54:22,079 ERROR ##.##.##.## - en-GB - / - mojoPortal.Web.Global -  Referrer(http://www.##########.co.uk/Secure/Login.aspx?returnurl=%2fDefault.aspx) useragent Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; WOW64; Trident/6.0)
System.Web.UI.ViewStateException: Invalid viewstate.
    Client IP: ##.##.##.##
    Port: 34086
    Referer: http://www.##########.co.uk/Secure/Login.aspx?returnurl=%2fDefault.aspx
    Path: /default.aspx
    User-Agent: Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; WOW64; Trident/6.0)
    ViewState: 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...
2015-02-08 22:55:16,991 INFO (null) - (null) - (null) - mojoPortal.Web.Global - Global.asax.cs Application_End

I have subsequently upgraded to v2.4.0.8, but I still get the same errors. I am using ASPNET 4.5 and I have made sure that I copied my original machinekey into the web.config. I have also tried from different PC's using Firefox, IE & Chrome all with the same result.

Any ideas?

Thanks,

Craig

Hi Joe,

Thanks for the reply. The fun that I had was that I couldn't login, so I was having difficulty changing the skin! I've done some experimenting & have found something rather strange...

I copied a brand new v2.4.0.8 installation onto a different domain, but used the same machinekey & connected to the original database. Everything worked fine! That made me think that your comment about skins might be where the problem was. Infact, my web hoster suggested it might be a similar problem & directed me to this blog: http://blogs.msdn.com/b/webdev/archive/2014/09/09/farewell-enableviewstatemac.aspx.

However, after backing up the old 'data' directory, I deleted it & copied a fresh data directory in it's place. Essentially both instances on both domains were then identical & are using the same database. The new domain works fine, but the old original one still has the same issues! Both are running in the same isolated application pool, ASPNET 4.5, IIS 7.5. I'll get back to my domain host & see if they can shed any light why this might be occurring and will let you know if I find a solution...

Hi Craig,

Thanks for the beer! Much appreciated.

I'm glad you were able to solve the problem. However, I would note that mojoPortal can run using either Classic or Integrated pipeline, and Integrated is actually preferred and Classic is considered legacy. All my sites are using Integrated, but if that solved it for your hosting environment that is ok too.

Cheers,

Joe

Joe, I've just found something interesting. If I'm in integrated mode the application runs fine on a new auto-generated MSSQL database, but if I connect it to my old one I get the errors. I've been using this old database for the last couple of years over several update versions. Is it possible that something has changed in the database setup that is causing the problems?