Unexpected BD-Rate traceback

[tdaede]

No traceback here: https://arewecompressedyet.com/?job=base_low%402017-02-07T21%3A50%3A31.303Z&job=palette_low_re%402017-02-14T02%3A00%3A01.550Z

But traceback here with otherwise identical run: https://arewecompressedyet.com/?job=base_low%402017-02-07T21%3A50%3A31.303Z&job=palette_low%402017-02-07T22%3A24%3A16.876Z

Traceback (most recent call last):
  File "./bd_rate_report.py", line 139, in <module>
    metric_data[video] = bdrate(args.run[0]+'/'+task+'/'+video+args.suffix,args.run[1]+'/'+task+'/'+video+args.suffix,None)
  File "./bd_rate_report.py", line 32, in bdrate
    b = loadtxt(file2)
  File "/opt/rh/rh-python34/root/usr/lib64/python3.4/site-packages/numpy/lib/npyio.py", line 848, in loadtxt
    items = [conv(val) for (conv, val) in zip(converters, vals)]
  File "/opt/rh/rh-python34/root/usr/lib64/python3.4/site-packages/numpy/lib/npyio.py", line 848, in <listcomp>
    items = [conv(val) for (conv, val) in zip(converters, vals)]
ValueError: could not convert string to float: b'for'