[AC]: RuntimeWarning: All-NaN slice encountered

19.02.2018 13:41:17 [processScriptOutputMessage] 2018/02/19 13:48:01 [26541538]:   Joining mask_clouds to LE71940232016134NSG00.
19.02.2018 13:41:18 [processScriptOutputMessage] 2018/02/19 13:48:01 [26541538]:   Combining masks...
19.02.2018 13:41:18 [processScriptErrorMessage] /home/gfz-fe/python_GFZ/python/lib/python3.6/site-packages/numpy/lib/function_base.py:3858: RuntimeWarning: All-NaN slice encountered
19.02.2018 13:41:18 [processScriptErrorMessage]   r = func(a, **kwargs)