signalstorm library characterizer question

[firegardeneve]

hello,

I am having some trouble with SLC.

For the vdd and gnd rails, i get the following message for the command:

db_dire V test vdd
vdd: port is not exist

db_dire G test gnd
gnd: port is not exist

Is there any other way I should be defining my power rails? The subckt
file also uses gnd and vdd.

Thanks