I had to write some good old classic ASP code today and my classic ASP coding skills are so rusty that I put tons of errors in the code. I'm used to having basic ASP error messages on IIS5 and 6 which usually help me to track down problems. On IIS7 I only got the following though:
An error occurred on the server when processing the URL. Please contact the system administrator
After investigating a bit I figured out that we changed the default for the "scriptErrorSentToBrowser" flag in IIS7. It's now false and you always get the error above. Here is how to change it:
1) Start an elevated command prompt. Right-click the command shell item in the Start-Accessories menu and select "Run as Administrator".
2) Run the following command: %windir%\system32\inetsrv\appcmd set config -section:asp -scriptErrorSentToBrowser:true
Once you are done with debugging your ASP app please set it back to false. There are lots of 'evildoers' out there! :)