mogrify-im6.q16 --version (return code: 0)
Version: ImageMagick 6.9.7-4 Q16 x86_64 20170114 http://www.imagemagick.org
Copyright: © 1999-2017 ImageMagick Studio LLC
License: http://www.imagemagick.org/script/license.php
Features: Cipher DPC Modules OpenMP
Delegates (built-in): bzlib djvu fftw fontconfig freetype jbig jng jpeg lcms lqr ltdl lzma openexr pangocairo png tiff wmf x xml zlib
mogrify-im6.q16 -HELP (return code: 1)
mogrify-im6.q16: unable to open image `--help': No such file or directory @ error/blob.c/OpenBlob/2701.
mogrify-im6.q16: no decode delegate for this image format `' @ error/constitute.c/ReadImage/504.