deepprobe node name for extracted netlist

Hi,

I'm trying to use deepprobe to access internal node of an extracted block.  My netlist is from Star-RC extraction and has default node name format as below:

Q2

Q2:1

I113/MMP0:G

...

the top level is called Itop, so far I only had success in below:

Itop.Q2

and below doesn't seem to work:

Itop.Q2\:1

Itop.I113\|MMP0\:G

I also try to replace colon with underscore in the netlist file (Q2:1 ->  Q2_1), but below still doesn't work

Itop.Q2_1

Any comment on what is wrong with my syntax?

thanks,

Kevin