save function ERROR: UndefVarError: save not defined

[dengfei2013]

I want to save a DataFrame as Excel:

using DataFrames
Herd = [1,1,2,2,2,3,3,3,3];
Sire = ["ZA","AD","BB","AD","AD","CC","CC","AD","AD"];
Yield = [110,100,110,100,100,110,110,100,100];
dat = DataFrame(Herd=Herd, Sire = Sire, Yield = Yield);
dat

I have to use ExcelFiles.save("dat.xlsx",dat) to do it, and save("dat.xlsx",dat) show Errors:

using ExcelFiles
save("dat.xlsx",dat) # Error
ExcelFiles.save("dat.xlsx",dat) # Worked

Error message:

julia> using ExcelFiles

julia> save("dat.xlsx",dat)
ERROR: UndefVarError: save not defined
Stacktrace:
 [1] top-level scope at none:0

julia> ExcelFiles.save("dat.xlsx",dat)

My status:

julia> Pkg.status()
    Status `C:\Users\Dengfei\.julia\environments\v1.1\Project.toml`
  [aae01518] BandedMatrices v0.9.4
  [6e4b80f9] BenchmarkTools v0.4.2
  [a134a8b2] BlackBoxOptim v0.5.0
  [336ed68f] CSV v0.5.9
  [324d7699] CategoricalArrays v0.5.5
  [3da002f7] ColorTypes v0.8.0
  [34da2185] Compat v2.1.0
  [8f4d0f93] Conda v1.3.0
  [a93c6f00] DataFrames v0.19.1
  [1313f7d8] DataFramesMeta v0.5.0
  [5721bf48] DataVoyager v0.3.1
  [459566f4] DiffEqCallbacks v2.7.0
  [01453d9d] DiffEqDiffTools v1.2.0
  [0c46a032] DifferentialEquations v6.6.0
  [31c24e10] Distributions v0.21.1
  [89b67f3b] ExcelFiles v1.0.0
  [c04bee98] ExcelReaders v0.11.0
  [2fe49d83] Expectations v1.1.0
  [442a2c76] FastGaussQuadrature v0.3.3
  [1a297f60] FillArrays v0.6.3
  [9d5cd8c9] FixedEffectModels v0.7.3
  [587475ba] Flux v0.8.3
  [f6369f11] ForwardDiff v0.10.3
  [38e38edf] GLM v1.1.1
  [28b8d3ca] GR v0.41.0
  [7073ff75] IJulia v1.19.0
  [43edad99] InstantiateFromURL v0.3.0
  [a98d9a8b] Interpolations v0.12.2
  [b6b21f68] Ipopt v0.5.4
  [c9a035f4] JWAS v0.5.4
  [4076af6c] JuMP v0.19.2
  [5ab0869b] KernelDensity v0.5.1
  [b964fa9f] LaTeXStrings v1.0.3
  [23fbe1c1] Latexify v0.8.2
  [5078a376] LazyArrays v0.9.1
  [0fc2ff8b] LeastSquaresOptim v0.7.2
  [093fc24a] LightGraphs v1.2.0
  [76087f3c] NLopt v0.5.1
  [2774e3e8] NLsolve v4.1.0
  [429524aa] Optim v0.19.2
  [d96e819e] Parameters v0.10.3
  [14b8a8f1] PkgTemplates v0.6.1
  [91a5bcdd] Plots v0.25.3
  [f27b6e38] Polynomials v0.5.2
  [92933f4c] ProgressMeter v0.9.0
  [d330b81b] PyPlot v2.8.1
  [1fd47b50] QuadGK v2.1.0
  [fcd29c91] QuantEcon v0.16.1
  [1a8c2f83] Query v0.12.0
  [612083be] Queryverse v0.3.1
  [df47a6cb] RData v0.6.2
  [ce6b1742] RDatasets v0.6.3
  [d519eb52] RegressionTables v0.2.0
  [295af30f] Revise v2.1.6
  [f2b01f46] Roots v0.8.1
  [90137ffa] StaticArrays v0.11.0
  [2913bbd2] StatsBase v0.32.0
  [3eaba693] StatsModels v0.5.0
  [f3b207a7] StatsPlots v0.11.0
  [c3572dad] Sundials v3.6.1
  [bd369af6] Tables v0.2.10
  [37b6cedf] Traceur v0.3.0
  [0ae4a718] VegaDatasets v1.0.0
  [112f6efa] VegaLite v0.7.0
  [bd07be1c] Winston v0.15.0
  [37e2e46d] LinearAlgebra
  [9a3f8284] Random
  [2f01184e] SparseArrays
  [10745b16] Statistics
  [8dfed614] Test

[davidanthoff]

I can't replicate that, and the error seems very weird because save is actually exported by ExcelFiles.jl here.

Are you sure that you are executing the code in the same order as you have posted in the issue?