Multiple render elements and backburner; only 1/3 nodes rendering VRaySamplerInfo element

[MonosP]

Hi all,
I'm rendering out a basic Phoenix FD waterfall sequence (a simple liquid surface with no mist/spray for now) with the following elements:

Beauty/Render Output
VRayZDepth
VRayNormals
VRaySamplerInfo, type set to Normal Vector, coord system set to World, output set to Vector (signed)

All elements are being rendered to EXR on a network drive and I'm not using the VRay frame buffer so I get each element as a separate file per frame.
After queueing the file to backburner to render across 3 nodes, only 1 of them renders out all 4 element files per frame. The other 2 nodes render all elements correctly except the VRaySamplerInfo file, that particular file is not written at all.

The Phoenix sim was cached at 24fps, I'm using the Input play speed to retime this and render at 60fps.

Any idea what could be causing this? It's got me stumped.
Thanks for any help,
Jon

[nikolay.kusht]

Have you tried rendering the same scene locally only on the one render node without backburner? Also, have you tried rendering a different scene and see if the one node is still not producing the VRaySamplerInfo element? Have you tried rendering multichannel EXR instead?

[MonosP]

Hey Nikolay,
Missed your reply when you initially posted, thanks for getting back to me.
I'll give all your suggestions a go and see if I can narrow the issue down, will post back when I have answers to your questions.
Cheers,
Jon