dfind missing error message

The following command produces a usage message, but no indication of which argument(s) I provided are/is invalid. Also, the exit status is 0.

bash-4.2$ which dfind
/usr/tce/packages/mpifileutils/mpifileutils-0.10/bin/dfind

bash-4.2$ dfind --input /p/lustre3/faaland1/vast.dwalk.mpfu /p/vast1/faaland1/  --name '*test*'            

Usage: dfind [options] <path> EXPRESSIONS...

Options:
  -i, --input <file>                      - read list from file
  -o, --output <file>                     - write processed list to file
  -v, --verbose                           - verbose output
  -q, --quiet                             - quiet output
  -h, --help                              - print usage

Tests:
  --amin N       - last accessed N minutes ago
  --anewer FILE  - last accessed more recently than FILE modified
  --atime N      - last accessed N days ago
  --cmin N       - status last changed N minutes ago
  --cnewer FILE  - status last changed more recently than FILE modified
  --ctime N      - status last changed N days ago
  --mmin N       - data last modified N minutes ago
  --newer FILE   - modified more recently than FILE
  --mtime N      - data last modified N days ago

  --gid N        - numeric group ID is N
  --group NAME   - belongs to group NAME
  --uid N        - numeric user ID is N
  --user NAME    - owned by user NAME

  --name PATTERN - base name matches shell pattern PATTERN
  --path PATTERN - full path matches shell pattern PATTERN
  --regex REGEX  - full path matches POSIX regex REGEX

  --size N       - size is N bytes.  Supports attached units like KB, MB, GB
  --type C       - of type C: d=dir, f=file, l=symlink

  Tests with N can use -N (less than N), N (exactly N), +N (more than N)

Actions:
  --print        - print item name to stdout
  --exec CMD ;   - execute CMD on item

Reproduce the shown dfind command and start at the command-line argument parsing entry point. Trace how invalid arguments produce the usage message; done means the output identifies the invalid argument(s) and the command exits with a nonzero status.