Including PWL files in Spectre

Hi,

I want to include a pwl file (from Setup->Model Libraries) that would define few signals in my block. I used the following format (included below is the 3 line pwl file format I used). It works fine if the pins "nodeA" "nodeB" are on the top level of the schematic.

simulator lang=spectre

VNODEA (nodeA 0) vsource type=pwl wave = [0 0 10n 0 20n 1]

VNODEB (nodeB 0) vsource type=pwl wave = [0 0 20n 0 30n 2]

But if those nodes are present 2 level inside the hierarchy and if those pins do not come to the top level schematic, I would like to know how to define those nets in that case. Lets say the top level instance is I0 and inside it is another instance called I2. And if these signals are in that level, what format should I use?

I tried the following (just like how the net would be described, if I plot it in analog artist), but it does not seem to work.

VNODEA (/I0/I2/nodeA 0) vsource type=pwl wave = [0 0 10n 0 20n 1]

Thanks,

Kumar