Running a specific Study node using batch

Hi,

I would like to run a specific Study node (suppose I have a model with 2 or more Study nodes) using batch commands. Normally I write something like

comsol -nn 8 -np 8 batch -inputfile input.mph -outputfile output.mph -batchlog batch.log

Does anyone know which additional command I should issue to be able to select a specific Study node to run?

Best,

J