DR rendering white buckets

[PIXELBOX_SRO]

Hi,

among all other issues were gettgin with the DR lately, here is a new one.
Half render done and all of the sudden we started gettgin white buckets from our nodes.
Could this be the spawning camera issue? Why is this happening on half of the image? The low res preview render went just fine.
Were using latest vray (not nightly) MAX 2016 SP3

Here is the sample:


any ideas?

Thank you very much for help!
Martin

[PIXELBOX_SRO]

ok, so we have found that one of the nodes was running two spawners.
we killed the excessive one ans its rendering fine.