如果有多个scenario，则每个scenario都要设进去：

set j_current_scenario [current_scenario ]
foreach_in_collection j_obj [get_scenarios ] {
	current_scenario $j_obj
	puts "JOE-INFO : current scenario is [get_object_name [current_scenario ] ]"
	group_path -from [all_registers] -to [all_icgs] -weight 5 -name REG_2_ICG -critical_range 0.2
	source user_path_group.tcl
}