Sorry, I don't remember the LP liberty results from 9.1. I do see some problems with the order of commands in your script.
Here is a sample dofile I got from the online "web interface" documentation
set lowpower option -netlist_style logical
//set lowpower option -netlist_style hybrid
//set lowpower option -netlist_style physical
read library -append -liberty -lp <liberty files>
read design <design_files>
report design data
report black box -class
read power intent -cpf <CPF files> -post_synthesis
//read power intent -cpf <CPF files> -post_route
commit power intent
analyze power domain
The web interface documentation is opened via
SETUP> set web interface on
There are many sample dofile there.
There are also "Rapid Adoption Kits" or RAKs located here
or for CLP:
This should point you in the right direction. I wouldn't continue working with 9.1 for LP liberty since that version was early in the LP liberty adoption phase.