ProRes crash

[shibbycribby]

Hi I'm having issues with ProRes conversions, I'm trying a passthrough from prores to prores on 422 HQ SD with a vapoursynth deinterlace, vague denoiser and santiag antialias applied. Encoding works correctly up to the mux upon which the endoer reads aborting muxing due to error and then says the mov is too small 0 bytes. I've tried doing the same without audio which works without issue so seems to be some issue with hybrid picking up the temp video and joining the audio to it. 

Any help appreciated.

Thanks