Error occurs when "write_when_maxdim_exceeds” arguments are given in tdvp()

ITensor Julia Questions
1

Hello everyone!
When I use “write_when_maxdim_exceeds” arguments to tdvp() function, it returns that

ERROR: LoadError: UndefVarError: `disk` not defined
Stacktrace:
 [1] tdvp(solver::Function, PH::ProjMPO, t::ComplexF64, psi0::MPS; kwargs::Base.Pairs{Symbol, Integer, NTuple{7, Symbol}, NamedTuple{(:nsweeps, :maxdim, :cutoff, :nsite, :outputlevel, :normalize, :write_when_maxdim_exceeds), Tuple{Int64, Int64, Int64, Int64, Int64, Bool, Int64}}})
   @ ITensorTDVP ~/.julia/packages/ITensorTDVP/V1Kco/src/tdvp_generic.jl:80
 [2] tdvp
   @ ~/.julia/packages/ITensorTDVP/V1Kco/src/tdvp_generic.jl:45 [inlined]
 [3] tdvp(solver::Function, H::MPO, t::ComplexF64, psi0::MPS; kwargs::Base.Pairs{Symbol, Integer, NTuple{7, Symbol}, NamedTuple{(:nsweeps, :maxdim, :cutoff, :nsite, :outputlevel, :normalize, :write_when_maxdim_exceeds), Tuple{Int64, Int64, Int64, Int64, Int64, Bool, Int64}}})
   @ ITensorTDVP ~/.julia/packages/ITensorTDVP/V1Kco/src/tdvp_generic.jl:150
 [4] tdvp
   @ ~/.julia/packages/ITensorTDVP/V1Kco/src/tdvp_generic.jl:143 [inlined]
 [5] #tdvp#41
   @ ~/.julia/packages/ITensorTDVP/V1Kco/src/tdvp.jl:47 [inlined]

psi = tdvp(
        HAL,
        -im*tstep,
        psi;
        nsweeps=1,
        maxdim=max,
        cutoff=0,
        nsite=1,
        outputlevel=1,
        normalize=true,
        # solver_backend="applyexp"
        write_when_maxdim_excceds=1000
        )

The ITensor version I use is “0.3.42” and “0.1.4” of ITensorTDVP.

It looks like a bug, since “disk()” was presents in ITensors.jl.

Is there any way to fix it?

Thanks a lot !
Wang.