Samples complete but frame never saves or moves on

[sbstnc]

Problem with a scene originally created in 3.08 R18. Now in R20 Octane 4.02. Problem occurs on both Mac and PC.

When rendering, samples count up to whatever they are set to - I've tried from 64 all the way to 3000. When complete, C4D and Octane just sit there. The time counter at bottom of PV still tick up... but forever. Frame never saves, it never moves to the next frame.

Not sure what to do or how to solve. That this is happening on both Mac and PC seems to indicate it's not hardware or drivers. Suggestions welcome please.

[aoktar]

Scene please or check if you're using denoiser.

[sbstnc]

I am indeed using the denoiser, as this was my main reason for opening the scene in the new version.
I will PM you a link.

[sbstnc]

For anyone else having this issue, it appeared to be not the right combination of "use denoiser" tickboxes - as there are several of these to choose from in different locations.