objref make_go_file
make_go_file=new File()

// create go file in other simulation directory which triggers
// that simulation to run (it has to have 
// {xopen("wait_for_go.hoc") init() run() }
// entered on the command line, then run here

{ make_go_file.wopen("go") init() run() }

// alternatively two cells could be created (healthy and abeta) and run in the same simulation.