ruby on rails - Paperclip::Errors::NotIdentifiedByImageMagickError in Spree::Admin -

there similar questions around, many old , none have answer specific scenario: paperclip automatically installed spree.

with spree version 3.0.0, output of gem list shows:

cocaine (0.5.7) paperclip (4.2.4)

what needs fixed:

paperclip::errors::notidentifiedbyimagemagickerror in spree::admin::imagescontroller#create

i'm hoping find out need downgrade cocain version... no dice yet.

turned out problem images working with. found out trying identify them in command line.

identify poor-quality-image.png

it threw same error.

WIKI