I can only see Alpha channel in cylces GPU render

Whenever I render my file using GPU render rather than CPU in cycles, I only get back an empty image with only an Alpha channel. I have tried opening it in GIMP and it is only the alpha channel and I also ‘Stamped’ the render So it is an empty Alpha channel.
Though CPU still renders fine and I can still GPU render in other files so it is only this one file.
Here is the image
[ATTACH=CONFIG]300426[/ATTACH]

Any Ideas?

Unfortunately the screenshot on its own tells us nothing about your scene, only a limited number of render settings.

It would be much more useful to supply an example blend file that demonstrates this behaviour. Also supply basic info such as your blender version, computer / graphics card spec etc

I saved over my original file and appended what I needed :frowning:
sorry I’m not sure what happened