As described in the eimsim
documentation, the functionality of package eimsim
is divided into things that need to be done only once and things which must be done 
times for simulation runs. The `done once' things can be further divided into those things which must be done before the simulation runs, and those things which must be done afterward. The `before' things are gathered into eimsimprep; the ` simulation runs' things are to be found within the present task eimsimbatch; and the `afterward' things are performed within eimsimreduce.
The task eimsimbatch is designed to be run an unlimited number of times, and also if desired simultaneously on separate processors, in order to accumulate many independent results and thus better statistics. Its parameters comprise all those for eimsim, plus the following: nfields, startatn, nextonfail and cleanup.
