Drill down(hierarchies) is not working for "Treemap visualization" in Spotfire Web Player.

Drill down(hierarchies) is not working for "Treemap visualization" in Spotfire Web Player.

Hierarchy slider in the X-axis of the "Treemap visualization" is not working. Follow the below steps to resolve this issue:

1) Open the analysis file in Spotfire Analyst and right click on the tree map visualization & select 'Properties' option.
2) Now select Data tab >> Change from None to any desired marking in the marking window.
3) Save the analysis file once again.