Unable to create thumbnail or reduced size image.

[bekky]

When i try to upload pics it says its unable to create thumbnail or reduce the size image. How do i fix it or reduce the size image.?

[Joachim Müller]

Do exactly as suggested in http://coppermine-gallery.net/demo/cpg14x/docs/index.htm#upload_trouble when asking for support on upload issues. Make sure that you have set permissions as suggested in the docs.