CPF_Read Issue

Hello,

I tried to read cpf file in RTL Compiler v8.0. the specification of isolation cells went fine however the cpf_read reports unsupported power_switch_cell. I used the following definifation for power switch cell and I am using 45nm NanGateOpenCellLibrary. 

define_power_switch_cell -cells HEADER_0E_X* -power VVDD -power_switchable VDD -stage_1_enable SLEEP -type header

Any suggestions over that?

Thanks in advance,

Affaq