Online Help:

Usage: /vol/vssp/local/trees/amma-4/linux/bin/exface4 [options] 
   -optload () [] Load options from a file.  
   -optsave () [] Save options to a file.  
   -i (1.tri) [1.tri] input  filename .tri
   -o (2.tri) [2.tri] input  filename .tri
   -n (0) [0] grow n paired triangles 
   -m (FALSE) [FALSE] try many differenct seeds
   -open (FALSE) [FALSE] seed on the surface boundary
   -tr (FALSE) [FALSE] trace print out
   -df (FALSE) [FALSE] diagnostic files saved
   -ce (FALSE) [FALSE] centroid technique
   -neck (TRUE) [TRUE] set the testneck switch
   -help (TRUE) [FALSE] Print usage information.