Try /maxcpucount:4 and --parallel 4
Try /maxcpucount:4 and --parallel 4

Was just /maxcpucount; not sure what that does and test were run 8 at a time.
elkingtonmcb/simbody,scamille/simbody,chrisdembia/simbody,simbody/simbody,scamille/simbody,robojukie/simbody,elkingtonmcb/simbody,chrisdembia/simbody,robojukie/simbody,simbody/simbody,elkingtonmcb/simbody,chrisdembia/simbody,scamille/simbody,Gjacquenot/simbody,Gjacquenot/simbody,robojukie/simbody,Gjacquenot/simbody