Enable Error Messages

You can turn off friendly error messages for the sharepoint websites. It will be helpfull at the time of development. Follow the steps to enable error message.

1. Open the web.config file from the below Url
C:\Inetpub\wwwroot\wss\VirtualDirectories\80

2. Set the "CallStack" value to "true"
<SafeMode CallStack="true" ... >

3. Set customErrors mode to "Off"
<customErrors mode="Off" >

4. Save and Close the web.config file.