With Julia, I created a sparse matrix with the spzeros() function, initialized the matrix with some sentences, and tried to calculate the eigenvalue of it. However, the function works well only for small sparse matrix(n<800), for a little bit larger matrix, i got some error.

The code:

```
ns = 400 # 800
H = spzeros(Complex128, ns, ns)
#... initialization
E, x = eigs(H)
```

The error message after the last sentence:

LoadError: Base.LinAlg.ARPACKException(“unspecified ARPACK error: 1”) while loading In[7], in expression starting on line 1

in aupd_wrapper(::Type{T}, ::Base.LinAlg.#matvecA!#69{SparseMatrixCSC{Complex{Float64},Int64}}, ::Base.LinAlg.##63#70, ::Base.LinAlg.##64#71, ::Int64, ::Bool, ::Bool, ::String, ::Int64, ::Int64, ::String, ::Float64, ::Int64, ::Int64, ::Array{Complex{Float64},1}) at .\linalg\arpack.jl:53 in #_eigs#62(::Int64, ::Int64, ::Symbol, ::Float64, ::Int64, ::Void, ::Array{Complex{Float64},1}, ::Bool, ::Base.LinAlg.#_eigs, ::SparseMatrixCSC{Complex{Float64},Int64}, ::UniformScaling{Int64}) at .\linalg\arnoldi.jl:268 in (::Base.LinAlg.#kw##_eigs)(::Array{Any,1}, ::Base.LinAlg.#_eigs, ::SparseMatrixCSC{Complex{Float64},Int64}, ::UniformScaling{Int64}) at .:0 in #eigs#55(::Array{Any,1}, ::Function, ::SparseMatrixCSC{Complex{Float64},Int64}, ::UniformScaling{Int64}) at .\linalg\arnoldi.jl:78 in (::Base.LinAlg.#kw##eigs)(::Array{Any,1}, ::Base.LinAlg.#eigs, ::SparseMatrixCSC{Complex{Float64},Int64}, ::UniformScaling{Int64}) at .:0 in #eigs#59(::Array{Any,1}, ::Function, ::SparseMatrixCSC{Complex,Int64}, ::UniformScaling{Int64}) at .\linalg\arnoldi.jl:85 in (::Base.LinAlg.#kw##eigs)(::Array{Any,1}, ::Base.LinAlg.#eigs, ::SparseMatrixCSC{Complex,Int64}, ::UniformScaling{Int64}) at .:0 in #eigs#54(::Array{Any,1}, ::Function, ::SparseMatrixCSC{Complex,Int64}) at .\linalg\arnoldi.jl:77 in (::Base.LinAlg.#kw##eigs)(::Array{Any,1}, ::Base.LinAlg.#eigs, ::SparseMatrixCSC{Complex,Int64}) at .:0