[Rivet] Problem with multiprocessing in rivet 2.4.1

[Yallup, David]

Hi,


I updated to rivet 2.4.1 and yoda 1.5.9 and was generating events for the analysis ATLAS_2014_I1319490,


The yoda file appears to have created correctly (attached a copy with basically no events), but I get the following error when running rivet-mkhtml on it


david at yallup:~/Desktop/WeakTest$ rivet-mkhtml LHC.yoda
Making 34 plots
Traceback (most recent call last):
  File "/home/david/Install/Herwig-7.0.0/bin/make-plots", line 2607, in <module>
    for i, _ in enumerate(pool.imap(process_datfile, datfiles)):
  File "/usr/lib/python2.7/multiprocessing/pool.py", line 659, in next
    raise value
ValueError: invalid literal for float(): 0$


Couple of notes:

- It is just for this analysis routine (I suspect as this is one with selectable modes for muon and e channels)

- It runs fine if I swap the make-plots from 2.4.1 out for the 2.4.0 (think this multiprocessing was new)


Seemed like a bug to me, but I might have messed up along the way somewhere!

Thanks for your help,

David
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