Online Help:

Usage: /vol/vssp/local/trees/amma-4/linux/bin/ex_kutta [options] 
   -optload () [] Load options from a file.  
   -optsave () [] Save options to a file.  
   -ex (1) [1] example number 
   -h (0.01) [0.01] stepsize 
   -mt (1) [1] maximum integration time 
   -mh (30) [30] maximum number of stepsize halvings 
   -re (0.0001) [0.0001] relative error 
   -ae (0.0001) [0.0001] absolute error 
   -tr (FALSE) [FALSE] more output to the screen
   -help (TRUE) [FALSE] Print usage information.