Saving out IR maps CRASH

[stezza]

Getting this error...

// Error: line 1: Exception [module=2] : Irradiance map thread //

Any ideas?
We are rendering out IR maps every 3rd frame for camera animation on a large village scene.

Many thanks
Maya 2015 Beta 3 nightly

[t.petrov]

Have you tried older or newer builds, or even V-Ray 3 final?
Can you share a scene, so we can reproduce it?