Online Help:

Usage: /vol/vssp/local/trees/amma-4/linux/bin/exvtring [options] 
   -optload () [] Load options from a file.  
   -optsave () [] Save options to a file.  
   -i (1.tri) [1.tri] input  filename .tri
   -o () [] output filename .tri
   -d (0) [0] delete first n vertices 
   -r (0) [0] refine by factor +refine -decimate 
   -fi (0) [0] fill up any holes with less than x sides, recommend -odd afterwards 
   -c (FALSE) [FALSE] perform some checks, count bounaries
   -f (FALSE) [FALSE] work on 4-sided patches
   -p (FALSE) [FALSE] print out
   -odd (FALSE) [FALSE] remove odd balls
   -dv (FALSE) [FALSE] remove disallowed vertices
   -sp (FALSE) [FALSE] split up the file - see split000.tri
   -fr (FALSE) [FALSE] remove fragments
   -bo (FALSE) [FALSE] dump boundary pts to bound.vec
   -tr (TRUE) [TRUE] trace
   -help (TRUE) [FALSE] Print usage information.