Hi, indexing by slices is broken on a 64 bit machine. On a 32 bit one, all is ok. Is something missing in the INSTANTIATE_ALL macro in sparsetools.i? r. In [1]: import scipy In [2]: scipy.__version__ Out[2]: '0.7.0.dev4195' In [3]: import numpy In [4]: numpy.__version__ Out[4]: '1.1.0.dev5106' (Pdb) mtx <12160x12160 sparse matrix of type '<type 'numpy.float64'>' with 235578 stored elements in Compressed Sparse Row format> (Pdb) mtx.data array([ 0. , 0. , 0. , ..., -0.00540995, -0.00636418, 0.0202062 ]) (Pdb) mtx.data.dtype dtype('float64') (Pdb) mtx.indices array([ 0, 1, 36, ..., 12136, 12155, 12159], dtype=int32) (Pdb) mtx.indptr array([ 0, 15, 30, ..., 235543, 235560, 235578], dtype=int32) (Pdb) ir slice(8974, 12160, None) (Pdb) ic slice(8974, 12160, None) (Pdb) mtx[ir,ic] *** NotImplementedError: Wrong number of arguments for overloaded function 'get_csr_submatrix'. Possible C/C++ prototypes are: get_csr_submatrix< int,signed char >(int const,int const,int const [],int const [],signed char const [],int const,int const,int const,int const,std::vector< int > *,std::vector< int > *,std::vector< signed char
*) get_csr_submatrix< int,unsigned char >(int const,int const,int const [],int const [],unsigned char const [],int const,int const,int const,int const,std::vector< int > *,std::vector< int > *,std::vector< unsigned char > *) get_csr_submatrix< int,short >(int const,int const,int const [],int const [],short const [],int const,int const,int const,int const,std::vector< int > *,std::vector< int > *,std::vector< short > *) get_csr_submatrix< int,unsigned short >(int const,int const,int const [],int const [],unsigned short const [],int const,int const,int const,int const,std::vector< int > *,std::vector< int > *,std::vector< unsigned short > *) get_csr_submatrix< int,int >(int const,int const,int const [],int const [],int const [],int const,int const,int const,int const,std::vector< int > *,std::vector< int > *,std::vector< int > *) get_csr_submatrix< int,unsigned int >(int const,int const,int const [],int const [],unsigned int const [],int const,int const,int const,int const,std::vector< int > *,std::vector< int > *,std::vector< unsigned int > *) get_csr_submatrix< int,long long >(int const,int const,int const [],int const [],long long const [],int const,int const,int const,int const,std::vector< int > *,std::vector< int > *,std::vector< long long > *) get_csr_submatrix< int,unsigned long long >(int const,int const,int const [],int const [],unsigned long long const [],int const,int const,int const,int const,std::vector< int > *,std::vector< int > *,std::vector< unsigned long long > *) get_csr_submatrix< int,float >(int const,int const,int const [],int const [],float const [],int const,int const,int const,int const,std::vector< int > *,std::vector< int > *,std::vector< float > *) get_csr_submatrix< int,double >(int const,int const,int const [],int const [],double const [],int const,int const,int const,int const,std::vector< int > *,std::vector< int > *,std::vector< double > *) get_csr_submatrix< int,long double >(int const,int const,int const [],int const [],long double const [],int const,int const,int const,int const,std::vector< int > *,std::vector< int > *,std::vector< long double *) get_csr_submatrix< int,npy_cfloat_wrapper >(int const,int const,int const [],int const [],npy_cfloat_wrapper const [],int const,int const,int const,int const,std::vector< int > *,std::vector< int > *,std::vector< npy_cfloat_wrapper > *) get_csr_submatrix< int,npy_cdouble_wrapper >(int const,int const,int const [],int const [],npy_cdouble_wrapper const [],int const,int const,int const,int const,std::vector< int > *,std::vector< int > *,std::vector< npy_cdouble_wrapper > *) get_csr_submatrix< int,npy_clongdouble_wrapper >(int const,int const,int const [],int const [],npy_clongdouble_wrapper const [],int const,int const,int const,int const,std::vector< int > *,std::vector< int > *,std::vector< npy_clongdouble_wrapper > *)