SharePoint - An unexpected error has occurred

Question

In SharePoint I am getting the following when I go to my new web part page:

Error

An unexpected error has occurred.

Web Parts

Answer 1

If you would like to know what exact error description is, then you need to make following changes in your SharePoint web application web.config file.

1. CallStack="false" changed to CallStack="true"

2. changed to

Save it and do IISRESET from command line.

Open Page again then you will get exact error.