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HomeHomeGetting StartedGetting StartedInstalling DNN ...Installing DNN ...Server Error Browsing from Vista after 4.6 UpgradeServer Error Browsing from Vista after 4.6 Upgrade
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9/18/2007 2:44 AM
 
David Carter

www.davecarter.me.uk
Joined: 2/26/2005
Posts: 5

Upgraded one of my sites (running 4.5.4) to 4.6 yesterday. It appears to run fine when viewed from a Windows XP machine but I get the following server error when there is an attempt to view it from a PC running Vista - any ideas?

Server Error in '/davecarter' 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.]

   DotNetNuke.HttpModules.Compression.WhitespaceFilter.Write(Byte[] buf, Int32 offset, Int32 count) +104

   System.Web.HttpWriter.Filter(Boolean finalFiltering) +251

   System.Web.HttpResponse.FilterOutput() +85

   System.Web.CallFilterExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +46

   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +64

 
 
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9/18/2007 10:13 AM
 
erizro

Joined: 9/9/2007
Posts: 7
 
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9/18/2007 10:37 AM
 
David Carter

www.davecarter.me.uk
Joined: 2/26/2005
Posts: 5

Yes, I assumed from the error message that this was something to do with the compression settings. What I had to do was comment out the...

<add name="Compression" type="DotNetNuke.HttpModules.Compression.CompressionModule, DotNetNuke.HttpModules" />

line in web.config and the site loaded OK. I then went into Host settings and unchecked "Use Whitespace filter". Uncommented the web.config line afterwards.

That did the trick! Thanks!
 
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9/18/2007 10:49 AM
 
Alex Shirley


Joined: 1/30/2006
Posts: 5038

I doubt this is vista specific, and I think the link above is your problem.

Open the database and find/view the row entries the hostsettings table.
Near the bottom will be WhitespaceFilter, try changing this from "Y" to "N". Start your portal and make sure you leave the whitespacefilter setting as it is.
Please let us know if this works.

Alex Shirley
 
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9/19/2007 4:19 AM
 
David Carter

www.davecarter.me.uk
Joined: 2/26/2005
Posts: 5

NukeAlexS wrote

I doubt this is vista specific, and I think the link above is your problem.

You're right. It wasn't Vista specific but it was strange that I could browse the site, logon and view updated info (such as the 4.6 release build) in host settings from my my work XP machine but couldn't from my Vista machine. Must have been something to do with caching though.

Editing the database directly would have been an easier way to solve this but, whichever, it's now working fine. Thanks!
 
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