ABR Encoding Error

I'm having problems encoding with ABR and only ABR. The video will render however after the render process it will not create a file.

Settings: b=15000000 preset=slow profile=main x265-params=high-tier=1:slow-firstpass=1

As said above the render process is fine however at the end of the render there is no file created.

Update: ABR seems to work fine consistently with Multipass and Slow Firstpass OFF

Been doing different tests for the past couple days, The bottom is the low level log. Hopefully I done this correct.

Shizz I done it wrong

This is the correct log.

Damn that's all cool brother, I will stick with the 1 pass encoding for now. Thanks Vouk!