How can I see the exception call stack in SharePoint 2010?

Question

I am trying to port a SharePoint 2007 site collection feature to 2010. During the feature activation, SharePoint shows the "yellow screen of death" stating "The current custom error settings for this application prevent the details of the application error from being viewed.".

AFAIK I have configured everything that is need to see the error: in c:\inetpub\wwwroot\wss\VirtualDirectories\80\web.config I have set

<system.web>
  <customErrors mode="Off" />
  <compilation debug="true" />

<SharePoint>
  <SafeMode CallStack="true" />

(other attributes/tags ommited for brevity)

This was enough for SharePoint 2007 to display the full stack trace. Am I missing something for 2010?

Answer 1

Ran into this as well. Had to modify web.config in 14 Root to enable it: set <customErrors mode="Off" /> in file C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\TEMPLATE\LAYOUTS\web.config .