Check to see if you are looking at it in solidworks view but rendering in camera view find you camera in the appearances tab and check to use camera view. You can work in split screen using camera view and you will see what the camera view sees.
Thanks Rollin, I will check that. I had already seen something similar on (https://forum.solidworks.com/thread/74401). Anyway, there are other problems, some fixed parts move during rendering (they don't when I use screen). I had to save an assembly as a part to keep everything in its place.
I always used the SW camera, and it always worked. Not anymore (SW14). So I added a camera, and chose it to render my animation, and that's it. Thanks Rollin Shultz.
there is tutorial for animation in solid work it self just read it an u well understand.