Sparse matrix problem when trying to creating a BasisMatrix object

[zlqs1985]

Argument error:illegal buffers for sparsematrixcsc when creating a BasisMatrix object

julia> versioninfo() Julia Version 1.8.5 Commit 17cfb8e65e (2023-01-08 06:45 UTC) Platform Info: OS: Windows (x86_64-w64-mingw32) CPU: 8 × Intel(R) Core(TM) i7-6820HQ CPU @ 2.70GHz WORD_SIZE: 64 LIBM: libopenlibm LLVM: libLLVM-13.0.1 (ORCJIT, skylake) Threads: 1 on 8 virtual cores Environment: JULIA_PKG_SERVER = https://mirrors.bfsu.edu.cn/julia JULIA_EDITOR = code JULIA_NUM_THREADS =

When trying to replicate the example in the demo example, I got

`ArgumentError: Illegal buffers for SparseMatrixCSC construction 270
Stacktrace:
[1] SparseMatrixCSC
@ C:\Users\lenovo\AppData\Local\Programs\Julia-1.8.5\share\julia\stdlib\v1.8\SparseArrays\src\sparsematrix.jl:29 [inlined]
[2] SparseArrays.SparseMatrixCSC(m::Int64, n::Int64, colptr::Vector{Int64}, rowval::Vector{Int64}, nzval::Vector{Float64})
@ SparseArrays C:\Users\lenovo\AppData\Local\Programs\Julia-1.8.5\share\julia\stdlib\v1.8\SparseArrays\src\sparsematrix.jl:44
[3] _allocate_row_kron_out(#unused#::Type{SparseArrays.SparseMatrixCSC}, A::Matrix{Float64}, B::SparseArrays.SparseMatrixCSC{Float64, Int64})
@ BasisMatrices C:\Users\lenovo.julia\packages\BasisMatrices\PZ1uM\src\util.jl:625
[4] _allocate_row_kron_out
@ C:\Users\lenovo.julia\packages\BasisMatrices\PZ1uM\src\util.jl:643 [inlined]
[5] row_kron(A::Matrix{Float64}, B::SparseArrays.SparseMatrixCSC{Float64, Int64})
@ BasisMatrices C:\Users\lenovo.julia\packages\BasisMatrices\PZ1uM\src\util.jl:33
[6] convert(::Type{Expanded}, bs::BasisMatrix{Direct, AbstractMatrix{Float64}}, order::Matrix{Int64})
@ BasisMatrices C:\Users\lenovo.julia\packages\BasisMatrices\PZ1uM\src\basis_structure.jl:149
[7] BasisMatrix
@ C:\Users\lenovo.julia\packages\BasisMatrices\PZ1uM\src\basis_structure.jl:246 [inlined]
[8] BasisMatrix(basis::Basis{2, Tuple{SplineParams{Vector{Float64}}, ChebParams{Float64}}}, tbm::Expanded, x::Matrix{Float64}, order::Int64)
@ BasisMatrices C:\Users\lenovo.julia\packages\BasisMatrices\PZ1uM\src\basis_structure.jl:304
[9] top-level scope
@ c:\Users\lenovo\Documents\Julia\NumericalMethods\jupyter-notebooks\BasisMatrices_demo.ipynb:1
UndefVarError: Φ not defined

Stacktrace:
[1] top-level scope
@ c:\Users\lenovo\Documents\Julia\NumericalMethods\jupyter-notebooks\BasisMatrices_demo.ipynb:6
UndefVarError: c not defined

Stacktrace:
[1] top-level scope
@ c:\Users\lenovo\Documents\Julia\NumericalMethods\jupyter-notebooks\BasisMatrices_demo.ipynb:7`

How could I fix this problem, Thank you.