Problem with collating outputs with payu

Your simulation runs correctly but the collating of the outputs does not work and you have this error message in the log file:
Traceback (most recent call last):
  File "/jobfs/local/pbs/mom_priv/jobs/268316.r-man2.SC", line 9, in <module>
  File "/apps/payu/0.6/lib/payu/subcommands/", line 93, in runscript
  File "/apps/payu/0.6/lib/payu/", line 606, in collate
  File "/apps/payu/0.6/lib/payu/models/", line 78, in collate
    assert mppnc_path
This probably means you don't have a mppnccombine executable in you mom/bin directory. If you need such a file please contact to know where to find it. Include a copy of the error message with your email please.