I keep getting ProMSRendererTool error -50: renderVideoFrame Failed

I'm on FCPX 10.3 and using OS El Capitan.

I'm trying to render a 50 second video through Compressor and I keep getting this error.
I've got plenty of disk space.

EDIT: Just noticed it rendered the file. But I'm still wondering about that error. Never got it before.

Any ideas?
Thanks.

Not entirely sure, but generally this indicates a corrupt frame somewhere in your video. Usually a frame number is identified, in which case you can change the timecode display to frames and then zoom in to find the culprit when using FCPX. In your case, no frame is identified in the error message, so I haven't seen that before. Here is a YouTube video showing how to correct that error message (and it points to a clip frame that is at its end). Maybe this will help. The actual fix is shown at 4:34 in the video.
Good luck. Video here:
UPDATE: The video link I posted was the wrong video I watched, and I cannot locate it anymore for some reason. The solution showed a clip that had no handle, (which is often common), and the person trimmed it back one frame and re-rendered and the error disappeared.

Thanks.

Weird thing about it. The full 10 minute video worked fine. It was just when I copied the first 50 seconds and put it into a new project that I had that error.

But, even though I got the error it compressed it fine. Strange.

I removed the link because it was re-directed to an unrelated video. If only one frame (as indicated in the post above) was causing the error, then you may not even notice it.

Cool. Just strange that there's no error in the full version which has the same frames.
Well, as long as I got the result.

Thanks again.