Hi,
We've been doing some additional testing here (under several conditions), but we are unable to reproduce your troubles and most probably it's related to use of different release(s) on some of your render nodes. Please follow this
Distributed Rendering issues post to double check, it's not related to an installation error.
If the problem persist, would you please specify used Forest Pack / 3ds Max / V-Ray versions? Thanks in advance.
Kind regards,