I am working my way through tutorial 2. I have created the ArticleHolder and ArticlePage classes and they show up as new page types in the CMS. However, when I try to create an ArticlePage page under an ArticleHolder page I get a blank warning dialog box. The only thing in it is the warning triangle. Can anyone tell me what this means or perhaps tell me how to view a log file to find out what is happening. I am stumped.

First be sure you have followed the tutorial closely, and have not taken any liberties with the code. Try not to taunt the SS code provided in the tutorials until you have a good handle on it's idiosyncrasies.

IF
You are working in Dev mode you should see any errors. Log in as an admin and set ?&isDev=1 in your url, per http://doc.silverstripe.com/doku.php?id=urlvariabletools

ELSEIF
You want logs, be sure the option is set then check em: http://doc.silverstripe.com/doku.php?id=error-handling#filesystem_logs

ELSEIF
None of the above helps, use Firebug's Net >> XHR tab to see what is going on. Viewing the actual request will give you insight into what is failing.

ELSE
Attach a screenshot of your error and we'll go from there

Thanks for the help. Unfortunately - or not - I needed to reinstall a second copy on another server. The second install worked just fine on the tutorial. I am not sure why the first did not work, but lets call it a noob error.