Border Rendering Error

When I press border in render settings and then try to render it just says,
“Image too small” and doesn’t render.
I didn’t find a solution and hope this wasn’t already posted!

It is most likely because you didn’t actually create a border. In camera view, SHIFT-BKEY and drag to create a border around a segment of the image you wish to render. Having a single-core machine I use this feature a lot to pick problem areas of the image to render so I can tweak lighting before doing a full-on 100% render.

nice thanks ^^