ICCR: toggle exclude for bits of a bus

Dear Sirs,

could anyone give me an example on how to exclude a bit of an internal bus in the toggle exclude file for ncelab?

For instance, if I use

INSTANCE <pathname>:<bus_name>*

I exclude from the statistics all the bits of the bus, but specifying a single bit, it seems not working

INSTANCE <pathname>:<bus_name>(<bit_number>)

I tried also to escape the parenthesis with

INSTANCE <pathname><bus_name>\(<bit_number>\)

but without success.

Thanks in advance

Sergio