import scipp as sc

data = sc.vectors(dims=['x'], values=[[1,2,3],[2,3,4]])
mask = sc.array(dims=['x'], values=[False, True])
da = sc.DataArray(data, masks={'mask':mask})
da.sum()

---------------------------------------------------------------------------
DTypeError                                Traceback (most recent call last)
Cell In[2], line 6
      4 mask = sc.array(dims=['x'], values=[False, True])
      5 da = sc.DataArray(data, masks={'mask':mask})
----> 6 da.sum()

File ~/code/scipp/scipp/src/scipp/core/reduction.py:114, in sum(x, dim)
     87 """Sum of elements in the input.
     88 
     89 If the input data is in single precision (dtype='float32') this internally uses
   (...)
    111     Ignore NaN's when calculating the sum.
    112 """
    113 if dim is None:
--> 114     return _call_cpp_func(_cpp.sum, x)
    115 elif isinstance(dim, str):
    116     return _call_cpp_func(_cpp.sum, x, dim=dim)

File ~/code/scipp/scipp/src/scipp/core/_cpp_wrapper_util.py:15, in call_func(func, out, *args, **kwargs)
     13     return data_group_nary(func, *args, **kwargs)
     14 if out is None:
---> 15     return func(*args, **kwargs)
     16 else:
     17     return func(*args, **kwargs, out=out)

DTypeError: 'where' does not support dtypes 'bool', 'vector3', 'vector3',