Why does this halt my perl application package 'not registered for warnings' -

i working in house web gateway frame work in perl. , trying use image::magick::thumbnail create thumbnail image.

but if have line

my ($thumb, $x, $y) = image::magick::thumbnail::create($image, 50); 

i following error.

package 'image::magick::thumbnail' not registered warnings 

i have tracked down line 313 of warnings.pm

        croaker("package '$category' not registered warnings") 

but i'm not sure why halts program ideas?

use warnings::register; creates warnings category same name current package.

image::magick::thumbnail checks if warnings of category image::magick::thumbnail enabled, doesn't create such category using use warnings::register;.

the line there in code, it's commented out?! edit module uncomment line solve problem. including following in script should trick:

{    package image::magick::thumbnail;    use warnings::register; }