error with loading the jld file containg the reture value of Optim.optimize

[xianqinglt]

I am using Julia 1.6.1, JLD v0.12.3, Optim v1.3.0
The reture value of Optim.optimize is saved in the "res.jld" file, while loading this file, I got
the following error:

julia> res = JLD.load("res.jld");
error parsing type string Optim.MultivariateOptimizationResults{Optim.LBFGS{Core.Nothing,LineSearches.InitialStatic{Core.Float64},LineSearches.HagerZhang{Core.Float64,Base.RefValue{Core.Bool}},Optim.#17#19},Core.Float64,Core.Array{Base.Complex{Core.Float64},3},Core.Float64,Core.Float64,Core.Array{Optim.OptimizationState{Core.Float64,Optim.LBFGS{Core.Nothing,LineSearches.InitialStatic{Core.Float64},LineSearches.HagerZhang{Core.Float64,Base.RefValue{Core.Bool}},Optim.#17#19}},1},Core.Bool,Core.NamedTuple{(:f_limit_reached, :g_limit_reached, :h_limit_reached, :time_limit, :callback, :f_increased),Core.Tuple{Core.Bool,Core.Bool,Core.Bool,Core.Bool,Core.Bool,Core.Bool}}}
Error encountered while load FileIO.File{FileIO.DataFormat{:JLD}, String}("res.jld").

Fatal error:
ERROR: syntax: incomplete: premature end of input
Stacktrace:
[1] top-level scope
@ none:1
[2] eval
@ .\boot.jl:360 [inlined]
[3] eval
@ C:\Users\dell.julia\packages\JLD\JHrZe\src\JLD.jl:1 [inlined]
[4] _julia_type(s::String)
@ JLD C:\Users\dell.julia\packages\JLD\JHrZe\src\JLD.jl:1020
[5] julia_type(s::String)
@ JLD C:\Users\dell.julia\packages\JLD\JHrZe\src\JLD.jl:41
[6] jldatatype(parent::JLD.JldFile, dtype::HDF5.Datatype)
@ JLD C:\Users\dell.julia\packages\JLD\JHrZe\src\jld_types.jl:695
[7] read(obj::JLD.JldDataset)
@ JLD C:\Users\dell.julia\packages\JLD\JHrZe\src\JLD.jl:385
[8] read(parent::JLD.JldFile, name::String)
@ JLD C:\Users\dell.julia\packages\JLD\JHrZe\src\JLD.jl:361
[9] #43
@ .\none:0 [inlined]
[10] iterate
@ .\generator.jl:47 [inlined]
[11] collect(itr::Base.Generator{Vector{String}, JLD.var"#43#45"{JLD.JldFile}})
@ Base .\array.jl:678
[12] (::JLD.var"#42#44")(file::JLD.JldFile)
@ JLD C:\Users\dell.julia\packages\JLD\JHrZe\src\JLD.jl:1271
[13] jldopen(::JLD.var"#42#44", ::String, ::Vararg{String, N} where N; kws::Base.Iterators.Pairs{Union{}, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})
@ JLD C:\Users\dell.julia\packages\JLD\JHrZe\src\JLD.jl:261
[14] jldopen
@ C:\Users\dell.julia\packages\JLD\JHrZe\src\JLD.jl:259 [inlined]
[15] fileio_load(f::FileIO.File{FileIO.DataFormat{:JLD}, String})
@ JLD C:\Users\dell.julia\packages\JLD\JHrZe\src\JLD.jl:1270
[16] #invokelatest#2
@ .\essentials.jl:708 [inlined]
[17] invokelatest
@ .\essentials.jl:706 [inlined]
[18] action(::Symbol, ::Vector{Union{Base.PkgId, Module}}, ::FileIO.Formatted; options::Base.Iterators.Pairs{Union{}, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})
@ FileIO C:\Users\dell.julia\packages\FileIO\40aie\src\loadsave.jl:217
[19] action
@ C:\Users\dell.julia\packages\FileIO\40aie\src\loadsave.jl:197 [inlined]
[20] action(::Symbol, ::Vector{Union{Base.PkgId, Module}}, ::Symbol, ::String; options::Base.Iterators.Pairs{Union{}, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})
@ FileIO C:\Users\dell.julia\packages\FileIO\40aie\src\loadsave.jl:185
[21] action
@ C:\Users\dell.julia\packages\FileIO\40aie\src\loadsave.jl:185 [inlined]
[22] load(::String; options::Base.Iterators.Pairs{Union{}, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})
@ FileIO C:\Users\dell.julia\packages\FileIO\40aie\src\loadsave.jl:113
[23] load(::String)
@ FileIO C:\Users\dell.julia\packages\FileIO\40aie\src\loadsave.jl:110
[24] top-level scope
@ REPL[4]:1
[25] eval
@ .\boot.jl:360 [inlined]
[26] eval_user_input(ast::Any, backend::REPL.REPLBackend)
@ REPL C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.6\REPL\src\REPL.jl:139
[27] repl_backend_loop(backend::REPL.REPLBackend)
@ REPL C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.6\REPL\src\REPL.jl:200
[28] start_repl_backend(backend::REPL.REPLBackend, consumer::Any)
@ REPL C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.6\REPL\src\REPL.jl:185
[29] run_repl(repl::REPL.AbstractREPL, consumer::Any; backend_on_current_task::Bool)
@ REPL C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.6\REPL\src\REPL.jl:317
[30] run_repl(repl::REPL.AbstractREPL, consumer::Any)
@ REPL C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.6\REPL\src\REPL.jl:305
[31] (::Base.var"#874#876"{Bool, Bool, Bool})(REPL::Module)
@ Base .\client.jl:387
[32] #invokelatest#2
@ .\essentials.jl:708 [inlined]
[33] invokelatest
@ .\essentials.jl:706 [inlined]
[34] run_main_repl(interactive::Bool, quiet::Bool, banner::Bool, history_file::Bool, color_set::Bool)
@ Base .\client.jl:372
[35] exec_options(opts::Base.JLOptions)
@ Base .\client.jl:302
[36] _start()
@ Base .\client.jl:485
Stacktrace:
[1] handle_error(e::ErrorException, q::Base.PkgId, bt::Vector{Union{Ptr{Nothing}, Base.InterpreterIP}})
@ FileIO C:\Users\dell.julia\packages\FileIO\40aie\src\error_handling.jl:61
[2] handle_exceptions(exceptions::Vector{Tuple{Any, Union{Base.PkgId, Module}, Vector{T} where T}}, action::String)
@ FileIO C:\Users\dell.julia\packages\FileIO\40aie\src\error_handling.jl:56
[3] action(::Symbol, ::Vector{Union{Base.PkgId, Module}}, ::FileIO.Formatted; options::Base.Iterators.Pairs{Union{}, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})
@ FileIO C:\Users\dell.julia\packages\FileIO\40aie\src\loadsave.jl:226
[4] action
@ C:\Users\dell.julia\packages\FileIO\40aie\src\loadsave.jl:197 [inlined]
[5] action(::Symbol, ::Vector{Union{Base.PkgId, Module}}, ::Symbol, ::String; options::Base.Iterators.Pairs{Union{}, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})
@ FileIO C:\Users\dell.julia\packages\FileIO\40aie\src\loadsave.jl:185
[6] action
@ C:\Users\dell.julia\packages\FileIO\40aie\src\loadsave.jl:185 [inlined]
[7] load(::String; options::Base.Iterators.Pairs{Union{}, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})
@ FileIO C:\Users\dell.julia\packages\FileIO\40aie\src\loadsave.jl:113
[8] load(::String)
@ FileIO C:\Users\dell.julia\packages\FileIO\40aie\src\loadsave.jl:110
[9] top-level scope
@ REPL[4]:1

[xianqinglt]

I just tested JLD2. It works for data of Optim.