Hi Paul,
below you can see the cuda log...
..seems I reached a limit of GPU memory.
Probably by using too much textures or otherwise?...
i have used 41 LDR RGB textures
I tried to take a few steps back in what I was doing and succeeded to get a rendered viewport again by setting the resolution from 3000x1800 to 1500x900.
How can I solve this if I want to render bigger res?... by making the textures less big in pixels, use less textures in total.. maybe you have another suggestion?
edited: And I do not understand why I get to th omax so quick, because the estimated size of all textures used is about 40MB or so?
It would be handy if the plugin shows a approx of what is used by what and what is left to use, because now I just went over the max without having any idea. I know it shows aused and frse Memory, but not what is dedicated to Resolution and textures.
Just before I had a blue screen... (aik%$@#)78...
) can that be due to this issue?
edited: maybe I should have posted this in the general forum and not in the Archicad plugin forum? Sorry to bug you..But now it is too late 
Edited again: I solved my own created misere
I used a very high poly OBJ for a proxy and that ate my Memory. Still it would be very handy to be able to monitor what is consuming the memory 
Greetings, Jeroen
Started logging on 11.07.14 14:16:32
OctaneRender version 2.01 (2010000)
CUDA error 2 on device 3: The API was unable to allocate enough memory to perform the requested operation.
-> Failed to allocated device memory
CUDA device 3: Failed to allocate post-proc buffers
CUDA error 2 on device 1: The API was unable to allocate enough memory to perform the requested operation.
-> Failed to allocated device memory
CUDA device 1: Failed to allocate post-proc buffers
CUDA error 2 on device 2: The API was unable to allocate enough memory to perform the requested operation.
-> Failed to allocated device memory
CUDA device 2: Failed to allocate post-proc buffers
