execute() error message doesn't include stderr of command?

[pipitone]

A user writes me and includes the output of mb after an error:

Traceback (most recent call last):
File "/home/user/MAGeTbrain/bin/qbatch", line 144, in

o, e = execute("qsub %s" % scriptfile, dry_run = options.dry_run)
File "/home/user/MAGeTbrain/bin/qbatch", line 27, in execute
raise Exception("Returns %i :: %s" %( proc.returncode, command ))
Exception: Returns 177 :: qsub .scripts/mb_atlas_YiVY_0
Traceback (most recent call last):
File "/home/user/MAGeTbrain/bin/mb", line 661, in
main()
File "/home/user/MAGeTbrain/bin/mb", line 199, in main
options.func(options)
File "/home/user/MAGeTbrain/bin/mb", line 285, in command_run
p.run()
File "/home/user/MAGeTbrain/bin/mb", line 498, in run
self.queue.run(stages=self._get_stage_order())
File "/home/user/MAGeTbrain/bin/mb", line 471, in run
walltime=walltime, processors = processors)
File "/home/user/MAGeTbrain/bin/mb", line 481, in qbatch
input='\n'.join(commands))
File "/home/user/MAGeTbrain/bin/mb", line 432, in execute
raise Exception("Returns %i :: %s" %( proc.returncode, command ))
Exception: Returns 1 :: qbatch -N mb_atlas_YiVY --afterok_pattern NONE* - 4
6:00:00

Rather unhelpful.