There is no default product selected when you switch from HS4 to SITC4 the 1st time.

[sibamohanty]

When you come to atlas from the landing page by clicking on tree map and immediately switch the data to SITC4, Atlas does not respond with anything,

example -
the query string changes from "Who imported coffee, not roasted in 2012 ?" to
"Who imported unknown in 2010 ?"

What is the expected behavior here ?

[sibamohanty]

Once you selected either a product or a country it works.

[makmanalp]

Hmm, interesting. I think the expected behavior would be to look up the SITC equivalent of the HS product (it's in the database, in a field called conversion_code I think). Or maybe that's already happening but that specific product has no equivalent (seems unlikely)?