/usr/bin/mm2gv: option -- unrecognized
Usage: /usr/bin/mm2gv [-uvcl] [-o file] matrix_market_filename
  -u   - make graph undirected
  -U i - treat non-square matrix as a bipartite graph
         i = 0   never
         i = 1   if pattern unsymmetric (default)
         i = 2   if matrix unsymmetric
         i = 3   always
  -v   - assign len to edges
  -c   - assign color and wt to edges
  -l   - add label
  -o <file> - output file