Warning render is failed

[thilima]

Hey guys,

I´m having this issue for a long time.
I start the render, everything goes well but suddently I receive the message "warning render is failed", and the render continues until finish BUT continues with just 2 of my 3 videocards working. I have 2 gtx 780ti and 1 quadro k5000. The quadro and one of the 780ti keep rendering but one of the 780ti just stop.

When I read the log I got this ...

Can't read bool from static pin 'unknown' (P_UNKNOWN, type PT_UNKNOWN) of node '' (NT_UNKNOWN, 000000007C67A080)
Tried to access pin via an invalid ID P_UNKNOWN (0)
Tried to access null node pin

I´m using the latest build 1.21.1 of octane for max (but its happening with 1.20 too) and the latest nvidia driver 347.88 , max2015 sp3.
I thought it was because of some overmemory issue but even with "use cpu memory" I got the same error.

Can someone help me?
I searched in the forum but everyone with the similar errors didn´t get any answer :/