I am receiving an error when I attempt to access files via the File Manager Nodes under the root of the Admin or Host accounts. I downloaded the site to my local machine to try and debug in VS2008, and I get a build error in the FileManager/WebConfig: Could not load assembly ICSharpCode.SharpZipLib, Version=0.83.1.0, Culture=neutral, PublicKeyToken=1B03E6ACF1164F73 The error on the production site is: Webpage error details User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; InfoPath.2; .NET CLR 3.5.21022; .NET CLR 3.5.30729; .NET CLR 3.0.30618; .NET CLR 1.1.4322; OfficeLiveConnector.1.3; OfficeLivePatch.0.0) Timestamp: Wed, 25 Feb 2009 16:20:02 UTC Message: 'dnn.controls.controls[...].selTreeNode' is null or not an object Line: 642 Char: 3 Code: 0 Are there any suggestions on how to fix?

What is the error that you receive when downloading files.

The errer is:
'dnn.controls.controls[...].selTreeNode' is null or not an object

It seems to be a java script message.

Hmmm, the original message that you posted also references OfficeLive.  Do you have any idea where that is coming from?

Which version of DotNetNuke are you using?

Does this happen when running in VS, on a website running from IIS, or both?

I am currently using dnn 4.9.1, but the error was there in 4.9.0 as well. I have the same issue on both servers, localhost and the hosted web server.

I don't have any good suggestions at this point.

Presumably you have the same errors on the two sites because one is an exact copy of the other.

The error that you posted in the first message is a VS compile error message. What happens if you browse to the site? Presumably, you'll see an error message from DotNetNuke or from IIS. What is that error message?

When I click on the folder I wish to access in the tree node of the file manager 'nothing' happens. I get the little triangle with the exclamation in the center on the lower lower left side of the ie8 browser window. Click on it, and the js error message is displayed: 'dnn.controls.controls[...].selTreeNode' is null or not an object.

Firefox give the same message.

The tech support people at Ihostasp.net think it is some kind of indexing glitch, but have no insight other than that. An odd discovery is that this happens on portal0, but portal1 works fine.

OK. I'm officially stumped at this point. Have you asked for help over at the DotNetNuke forums?

If you are using a custom skin, I'd recommend temporarily changing the site to a stock DotNetNuke skin to see if that can clear the problem. If you are using a custom skin, it's possible that it does something to break the File Manager?

Have you installed any custom modules on this site? Custom anything?

I re-applied the default dnn skin and the problem went away. I guess I should contact the skin vendor...?

Yes, your skin definitely should not break the File Manager.

Thank you for your insight.

If I make enought guesses, eventually I'll guess right!