TCC_Curve c-array error

[jtabarez]

When parsing the dss file this error appears
LoadError: UndefVarError: c_string not defined
When the tcc_curves are comment out the parse has no error.

[info | PowerModels]: Suppressing information and warning messages for the rest of this session. Use the Memento package for more fine-grained control of logging.
ERROR: LoadError: UndefVarError: c_string not defined
Stacktrace:
[1] _dss2eng_curve!(data_eng::Dict{String, Any}, data_dss::Dict{String, Any})
@ PowerModelsProtection .....\PowerModelsProtection.jl\src\io\dss\dss2eng.jl:246
[2] parse_opendss(data_dss::Dict{String, Any}; import_all::Bool, bank_transformers::Bool, time_series::String, dss2eng_extensions::Vector{Function})
@ PowerModelsDistribution .....julia\packages\PowerModelsDistribution\Pxoxg\src\io\dss\dss2eng.jl:1114
[3] #parse_opendss#3068
@ ......julia\packages\PowerModelsDistribution\Pxoxg\src\io\dss\dss2eng.jl:1008 [inlined]
[4] parse_file(io::IOStream, filetype::SubString{String}; data_model::PowerModelsDistribution.DataModel, import_all::Bool, bank_transformers::Bool, transformations::Vector{Any}, dss2eng_extensions::Vector{Function}, eng2math_extensions::Vector{Function}, eng2math_passthrough::Dict{String, Vector{String}}, make_pu_extensions::Vector{Function}, make_pu::Bool, multinetwork::Bool, global_keys::Set{String}, kron_reduce::Bool, phase_project::Bool, time_series::String)
@ PowerModelsDistribution .....julia\packages\PowerModelsDistribution\Pxoxg\src\io\common.jl:73
[5] #3092
@ .....julia\packages\PowerModelsDistribution\Pxoxg\src\io\common.jl:139 [inlined]
[6] open(f::PowerModelsDistribution.var"#3092#3093"{Base.Pairs{Symbol, Any, Tuple{Symbol, Symbol}, NamedTuple{(:dss2eng_extensions, :import_all), Tuple{Vector{Function}, Bool}}}, String}, args::String; kwargs::Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})
@ Base .\io.jl:330
[7] open
@ .\io.jl:328 [inlined]
[8] #parse_file#3091
@ .......julia\packages\PowerModelsDistribution\Pxoxg\src\io\common.jl:138 [inlined]
[9] #parse_opendss#322
@ ....\github\PowerModelsProtection.jl\src\io\opendss.jl:12 [inlined]
[10] parse_file(file::String; method::Missing, add_gensub::Bool, flat_start::Bool, neglect_line_charging::Bool, neglect_transformer::Bool, zero_gen_setpoints::Bool, import_all::Bool, kwargs::Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})
@ PowerModelsProtection ....\github\PowerModelsProtection.jl\src\io\common.jl:46
[11] parse_file(file::String)
@ PowerModelsProtection .....\github\PowerModelsProtection.jl\src\io\common.jl:33
[12] top-level scope
@ ....\github\PowerModelsProtection.jl\test\test.jl:35
in expression starting at .....\github\PowerModelsProtection.jl\test\test.jl:35

• OS: Windows
• Version
  DG_Prot_Fdr.zip
  10

Additional context
Add any other context about the problem here.

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