Raytracing stopped working?

[05uurx]

My raytraces are suddenly coming out all black, it was working earlier today.

Any ideas?

[05uurx]

I deleted all electrical items from the plan and the raytracing is working now, except the raytrace doesnt match my render view...hmm, still investigating i guess...i must have done something wrong somewhere.

[dr0591]

Some lighting fixtures can be set to be "render only" or "raytrace only," that can be one reason why your render view looks different from your raytrace. Not sure about the complete blackness, though -- sounds like somehow all the lights used for raytracing got deleted or turned off.