Posted: 2006-05-17T20:25:32-07:00
Sounds like the input may be a CMYK image and IM is thinking it may be a RGB image, or something like that. Perhaps you can post a link to the image you are using so we can test it further.
Use https://github.com/ImageMagick/ImageMagick/discussions instead.
http://studio.imagemagick.org/discourse-server/
http://studio.imagemagick.org/discourse-server/viewtopic.php?t=6547