Compass Sprite returning "File to import not found or unreadable" -

so, i've started using compass framework, , wish start using native spriting feature. in doing so, i've added following top of scss file:

@import 'compass/utilities'; @import "*.png"; @include all-img-sprites; 

after compiling, following error:

error path/to/my/project/css/scss/front.scss (line 4: file import not found or unreadable: *.png.  load paths: compass::spriteimporter path/to/my/project/css/scss c:/ruby22/lib/ruby/gems/2.2.0/gems/compass-core-1.0.3/stylesheets) compilation failed in 1 files. [finished in 1.7s] 

i've looked around solution this, surprise, though there's multiple threads on - can't seem find relevant.

i've tried renaming folders thinking "img" folders might keyworded or something, no avail. below you'll find config.rb.

# set root of project when deployed: http_path = ""  # configure sass path sass_path=  "path\\to\\my\\project\\css\\scss"  # folder locations sass_dir        = "css/scss" css_dir         = "css"  images_dir      = "img"  fonts_dir       = "fonts" javascripts_dir = "js" sprite_load_path = "img"  # disable debugging comments display original location of          selectors line_comments = false 

oh wait, there go! after bit more fiddling about. issue path. removing sprite_load_path config.rb file, , changing above to:

@import "raw/*.png"; @include all-raw-sprites; 

works fine. note img folder still set in config.rb.