Floorplanning and scripting problems

Hello,

I am running into some problems with the floorplanning of my design. My script basically consists of:

1- Change the floorplan size for a given density specification

2- Ungroup the top module, and place some sub-modules in my design at particular locations

The thing is when I run my script, the floorplan size is changed but not the density of the top module (which stays at 70%). To have it changed, I need to ungroup the top module by hand so the changes are applied.

How to automatize this in my script? If I ungroup the module in my script, it does not work as well, I still somehow need to do it by hand.

Am I missing something?

Thanks.