all workers fail megaTK render job

[westernx]

. . .  This might be a little off qube topic, but alot of our worker machines have been failing MegaTK jobs with the following errors ;

. . .

PHEN 0.2  info : maya_shaderglow():       Normalization ... 45.602001
PHEN 0.2  progr: maya_shaderglow(): Done!
DB   0.2  fatal  041052: accessing unknown tag 0x7f2a
DB   0.2  fatal  041052: accessing unknown tag 0x7f2a
DB   0.2  fatal  041052: accessing unknown tag 0x7f2a
DB   0.2  fatal  041052: accessing unknown tag 0x7f2a
DB   0.2  info : cleaning up memory mapped frame buffers
// Maya exited with status 1
dur: 00:03:48   Mem: 2575/7999 Mb Swap: 0/8191 Mb
exited with 1
 . . .
ERROR: exit status: 1

any help would be appreciated,

R