# Makie：ERROR: MethodError: no method matching create\_dim\_conversion(::Type{Union{Missing, Float64}}) The function \`create\_dim\_conversion\` exists, but no method is defined for this combination of argument types

**URL:** <https://discourse.julialang.org/t/makie-error-methoderror-no-method-matching-create-dim-conversion-type-union-missing-float64-the-function-create-dim-conversion-exists-but-no-method-is-defined-for-this-combination-of-argument-types/131156>\
**Category:** General Usage\
**Tags:** plotting, makie\
**Created:** [July 29, 2025, 4:20am UTC](https://discourse.julialang.org/t/makie-error-methoderror-no-method-matching-create-dim-conversion-type-union-missing-float64-the-function-create-dim-conversion-exists-but-no-method-is-defined-for-this-combination-of-argument-types/131156 "2025-07-29T04:20:49Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![dk-zen](https://avatars.discourse-cdn.com/v4/letter/d/90db22/32.png) [@dk-zen](https://discourse.julialang.org/u/dk-zen)\
**Post date:** [July 29, 2025, 4:20am UTC](https://discourse.julialang.org/t/makie-error-methoderror-no-method-matching-create-dim-conversion-type-union-missing-float64-the-function-create-dim-conversion-exists-but-no-method-is-defined-for-this-combination-of-argument-types/131156/1 "2025-07-29T04:20:49Z")

</div>

I upgraded Makie and the code that was working fine before started to give errors.  
Has anyone encountered this problem? or Would it be better to go back to the previous version?

```julia-auto
ERROR: MethodError: no method matching create_dim_conversion(::Type{Union{Missing, Float64}})
The function `create_dim_conversion` exists, but no method is defined for this combination of argument types.
Closest candidates are:
  create_dim_conversion(::Type{Categorical})
   @ Makie C:\Users\whkdi\.julia\packages\Makie\6zcxH\src\dim-converts\categorical-integration.jl:50
  create_dim_conversion(::Type{<:Dates.AbstractTime})
   @ Makie C:\Users\whkdi\.julia\packages\Makie\6zcxH\src\dim-converts\dates-integration.jl:61
  create_dim_conversion(::Type{<:Enum})
   @ Makie C:\Users\whkdi\.julia\packages\Makie\6zcxH\src\dim-converts\categorical-integration.jl:55
  ...

Stacktrace:
  [1] dim_conversion_from_args(values::Matrix{Union{Missing, Float64}})
    @ Makie C:\Users\whkdi\.julia\packages\Makie\6zcxH\src\dim-converts\dim-converts.jl:118
  [2] update_dim_conversion!
    @ C:\Users\whkdi\.julia\packages\Makie\6zcxH\src\dim-converts\dim-converts.jl:190 [inlined]
  [3] add_dim_converts!(attr::ComputePipeline.ComputeGraph, dim_converts::Makie.DimConversions, args::Tuple{…}, input::Symbol)
    @ Makie C:\Users\whkdi\.julia\packages\Makie\6zcxH\src\compute-plots.jl:454
  [4] add_dim_converts!(attr::ComputePipeline.ComputeGraph, dim_converts::Makie.DimConversions, args::Tuple{…})
    @ Makie C:\Users\whkdi\.julia\packages\Makie\6zcxH\src\compute-plots.jl:444
  [5] _register_argument_conversions!(::Type{Contourf}, attr::ComputePipeline.ComputeGraph, user_kw::Dict{Symbol, Any})
    @ Makie C:\Users\whkdi\.julia\packages\Makie\6zcxH\src\compute-plots.jl:486
  [6] register_arguments!
    @ C:\Users\whkdi\.julia\packages\Makie\6zcxH\src\compute-plots.jl:378 [inlined]
  [7] (Contourf)(user_args::Tuple{Vector{Float64}, Vector{Float64}, Matrix{Union{…}}}, user_attributes::Dict{Symbol, Any})
    @ Makie C:\Users\whkdi\.julia\packages\Makie\6zcxH\src\compute-plots.jl:740
  [8] _create_plot!(::Function, ::Dict{Symbol, Any}, ::Axis, ::Vector{Float64}, ::Vararg{Any})
    @ Makie C:\Users\whkdi\.julia\packages\Makie\6zcxH\src\figureplotting.jl:397
  [9] contourf!(::Axis, ::Vararg{…}; kw::@Kwargs{…})
    @ Makie C:\Users\whkdi\.julia\packages\Makie\6zcxH\src\recipes.jl:521
 [10] top-level scope
    @ d:\JuliaLang\beginToLearn\ziwu_visualization\MST_radar\plot_AWCN_Makie.jl:103
Some type information was truncated. Use `show(err)` to see complete types.

```

My package is as follows：

```julia-auto
  [336ed68f] CSV v0.10.15
  [13f3f980] CairoMakie v0.15.4
  [35d6a980] ColorSchemes v3.30.0
  [5ae59095] Colors v0.13.1
  [717857b8] DSP v0.8.4
  [a93c6f00] DataFrames v1.7.0
  [8bb1440f] DelimitedFiles v1.9.1
  [7a1cc6ca] FFTW v1.9.0
  [86fae568] ImageView v0.12.6
  [916415d5] Images v0.26.2
⌅ [a98d9a8b] Interpolations v0.15.1
  [ee78f7c6] Makie v0.24.4
  [10745b16] Statistics v1.11.1
  [ade2ca70] Dates v1.11.0

```

---

<div class="post-metadata">

**Author:** ![sdanisch](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/sdanisch/32/1406_2.png) [@sdanisch](https://discourse.julialang.org/u/sdanisch)\
**Post date:** [July 29, 2025, 8:29am UTC](https://discourse.julialang.org/t/makie-error-methoderror-no-method-matching-create-dim-conversion-type-union-missing-float64-the-function-create-dim-conversion-exists-but-no-method-is-defined-for-this-combination-of-argument-types/131156/2 "2025-07-29T08:29:48Z")

</div>

There are lots of this ways this could happen.  
Can you open an issue with a minimal example how to reproduce the error?

---

<div class="post-metadata">

**Author:** ![dk-zen](https://avatars.discourse-cdn.com/v4/letter/d/90db22/32.png) [@dk-zen](https://discourse.julialang.org/u/dk-zen)\
**Post date:** [July 29, 2025, 12:03pm UTC](https://discourse.julialang.org/t/makie-error-methoderror-no-method-matching-create-dim-conversion-type-union-missing-float64-the-function-create-dim-conversion-exists-but-no-method-is-defined-for-this-combination-of-argument-types/131156/3 "2025-07-29T12:03:38Z")

</div>

@sdanisch  
My confusion is that the same code and the same data were working properly before, but now they are causing an error.  
Here is a test example.

```julia-auto
julia> df_awcn_mini = df_awcn_ws[!, 17:27]
9×11 DataFrame
 Row │ 18.3 19.5 20.7 21.9 23.1 24.3 25.5 26.7 27.9 29.1 30.3       
     │ Float64? Float64? Float64? Float64? Float64? Float64? Float64? Float64? Float64? Float64? Float64?   
─────┼────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
   1 │ 13.02 12.02 12.04 9.01 6.09 7.92 7.73 6.53 14.08 missing missing    
   2 │ 13.2 15.18 19.26 26.11 26.4 50.49 9.79 44.81 89.12 missing missing    
   3 │ 16.82 13.59 16.11 19.11 15.5 12.42 10.34 6.55 3.62 missing 2.67
   4 │ 14.42 14.4 14.23 13.87 13.53 40.16 27.16 39.63 missing missing missing    
   5 │ 15.58 13.53 10.47 11.44 7.87 6.88 6.79 3.62 1.34 0.42 0.76
   6 │ 16.87 15.65 13.45 13.12 13.31 13.11 9.65 6.09 11.1 52.25 3.03
   7 │ 14.0 13.28 14.37 13.62 12.15 11.23 9.35 7.88 missing missing missing    
   8 │ 17.91 15.88 14.21 13.19 13.05 12.69 8.37 6.39 9.2 missing missing    
   9 │ 15.19 17.38 16.87 15.15 13.41 12.2 missing missing missing missing missing   

```

```julia-auto
datetimes = DateTime("2025-06-01T00:00:00"):Hour(1):DateTime("2025-06-02T08:00:00")
    tick_positions = datetime2unix.(datetimes) # Convert dates to Unix time (positions)
    tick_labels = Dates.format.(datetimes, "HH")
    df_awcn_mini = df_awcn_ws[!, 17:27]
    fig = Figure(; size=(1200, 900))
    ax = Axis(fig[1, 1],
        xlabel="Time UT", ylabel="Height(km)",
        title="horizonal Wind",
        xticks=(tick_positions, tick_labels),
        yticksmirrored=true, yminorticksvisible=true
    )
    ylims!(ax, 0, 30)

    h_0_30 = parse.(Float64, names(df_awcn_mini))
    ws_0_30 = Matrix(df_awcn_mini)
    # ws_0_30 = replace(Matrix(df_awcn_ws[:, 2:27]), missing => NaN)
    levels = range(extrema(skipmissing(ws_0_30))[1], extrema(skipmissing(ws_0_30))[2], length=20)

    c1 = contourf!(ax, 1:9, h_0_30, ws_0_30,
        levels=levels,
        colormap=:jet,
        extendlow=:auto,
        extendhigh=:auto)
    tightlimits!(ax)

    Colorbar(fig[1, 2], c1,
        label="horizonal wind [m/s]",
        height=Relative(0.9),
        width=20,
        labelsize=18)

    fig

```

---

<div class="post-metadata">

**Author:** ![sdanisch](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/sdanisch/32/1406_2.png) [@sdanisch](https://discourse.julialang.org/u/sdanisch)\
**Post date:** [July 29, 2025, 12:37pm UTC](https://discourse.julialang.org/t/makie-error-methoderror-no-method-matching-create-dim-conversion-type-union-missing-float64-the-function-create-dim-conversion-exists-but-no-method-is-defined-for-this-combination-of-argument-types/131156/4 "2025-07-29T12:37:48Z")

</div>

I think it’s this issue:

> <https://github.com/MakieOrg/Makie.jl/issues/5089>
>
> \## what version of Makie are you running? (\`\]st -m Makie\`)
> + \`Makie v0.23.0\`
> \#…# can you reproduce the bug with a fresh environment ? (\`\]activate --temp; add Makie\`)
> + Yes. 
> \## What platform + GPU are you on?
> + Ubuntu 24.04, AMD/ATI Phoenix1
> \## Which backend are you using?
> + GLMakie
> \## Please provide an minimal example of the failing code.
> \`\`\`julia
> using GLMakie
> 
> x = \[1.0, 2, 3, 4, 5\]
> y = \[1.0, 2, missing, 4, 5\]
> 
> x2 = \[12, 13, missing, 14, 15.0\]
> y2 = \[22, 23, missing, 24, 25.0\]
> 
> fig = Figure(; size=(800, 800))
> axis = Axis(fig\[1, 1\]; aspect=1, xlabel="X", ylabel="Y")
> 
> scatter!(axis, x, y; alpha=0.5)
> scatter!(axis, x2, y2; alpha=0.5)
> \`\`\`
> 
> Produces error:
> \`\`\`
> ERROR: LoadError: MethodError: no method matching create\_dim\_conversion(::Type{Union{Missing, Float64}})
> The function \`create\_dim\_conversion\` exists, but no method is defined for this combination of argument types.
> 
> Closest candidates are:
> create\_dim\_conversion(::Type{Categorical})
> @ Makie ~/.julia/environments/v1.11/dev/Makie/src/dim-converts/categorical-integration.jl:48
> create\_dim\_conversion(::Type{\<:Dates.AbstractTime})
> @ Makie ~/.julia/environments/v1.11/dev/Makie/src/dim-converts/dates-integration.jl:59
> create\_dim\_conversion(::Type{\<:Enum})
> @ Makie ~/.julia/environments/v1.11/dev/Makie/src/dim-converts/categorical-integration.jl:53
> ...
> 
> Stacktrace:
> \[1\] dim\_conversion\_from\_args(values::Vector{Union{Missing, Float64}})
> @ Makie ~/.julia/environments/v1.11/dev/Makie/src/dim-converts/dim-converts.jl:114
> \[2\] convert\_dim\_observable(conversions::Makie.DimConversions, dim::Int64, value::Observable{Any}, deregister::Vector{Observables.ObserverFunction})
> @ Makie ~/.julia/environments/v1.11/dev/Makie/src/dim-converts/dim-converts.jl:200
> \[3\] (::Makie.var"#220#222"{UnionAll, PointBased, Tuple{Observable{Any}, Observable{Any}}, Vector{Observables.ObserverFunction}, Makie.DimConversions})(i::Int6
> 4)
> @ Makie ~/.julia/environments/v1.11/dev/Makie/src/dim-converts/dim-converts.jl:189
> @ Makie ~/.julia/environments/v1.11/dev/Makie/src/dim-converts/dim-converts.jl:189
> \[4\] ntuple
> @ ./ntuple.jl:19 \[inlined\]
> \[5\] try\_dim\_convert(P::Type{Scatter}, PTrait::PointBased, user\_attributes::Dict{Symbol, Any}, args\_obs::Tuple{Observable{Any}, Observable{Any}}, deregister::Vector{Observables.ObserverFunction})
> @ Makie ~/.julia/environments/v1.11/dev/Makie/src/dim-converts/dim-converts.jl:183
> \[6\] conversion\_pipeline(P::Type{Scatter}, used\_attrs::Tuple{}, args::Tuple{Vector{Union{Missing, Float64}}, Vector{Union{Missing, Float64}}}, kw\_obs::Observable{Vector{Pair{Symbol, Any}}}, args\_obs::Tuple{Observable{Any}, Observable{Any}}, user\_attributes::Dict{Symbol, Any}, deregister::Vector{Observables.ObserverFunction}, recursion::Int64)
> @ Makie ~/.julia/environments/v1.11/dev/Makie/src/interfaces.jl:220
> \[7\] conversion\_pipeline(P::Type{Scatter}, used\_attrs::Tuple{}, args::Tuple{Vector{Union{Missing, Float64}}, Vector{Union{Missing, Float64}}}, kw\_obs::Observable{Vector{Pair{Symbol, Any}}}, args\_obs::Tuple{Observable{Any}, Observable{Any}}, user\_attributes::Dict{Symbol, Any}, deregister::Vector{Observables.ObserverFunction})
> @ Makie ~/.julia/environments/v1.11/dev/Makie/src/interfaces.jl:213
> \[8\] (Scatter)(user\_args::Tuple{Vector{Union{Missing, Float64}}, Vector{Union{Missing, Float64}}}, user\_attributes::Dict{Symbol, Any})
> @ Makie ~/.julia/environments/v1.11/dev/Makie/src/interfaces.jl:273
> \[9\] \_create\_plot!(::Function, ::Dict{Symbol, Any}, ::Axis, ::Vector{Union{Missing, Float64}}, ::Vararg{Vector{Union{Missing, Float64}}})
> @ Makie ~/.julia/environments/v1.11/dev/Makie/src/figureplotting.jl:377
> \[10\] scatter!(::Axis, ::Vararg{Any}; kw::@Kwargs{alpha::Float64})
> @ MakieCore ~/.julia/environments/v1.11/dev/Makie/MakieCore/src/recipes.jl:512
> \`\`\`

---

<div class="post-metadata">

**Author:** ![dk-zen](https://avatars.discourse-cdn.com/v4/letter/d/90db22/32.png) [@dk-zen](https://discourse.julialang.org/u/dk-zen)\
**Post date:** [July 29, 2025, 1:21pm UTC](https://discourse.julialang.org/t/makie-error-methoderror-no-method-matching-create-dim-conversion-type-union-missing-float64-the-function-create-dim-conversion-exists-but-no-method-is-defined-for-this-combination-of-argument-types/131156/5 "2025-07-29T13:21:43Z")

</div>

In the calling side, adding the following fixes the issue. It works. Thanks for @sdanisch.

```julia-auto
import Makie: create_dim_conversion

create_dim_conversion(union_typ::Type{Union{Missing,T}}) where {T<:Real} =
    create_dim_conversion(union_typ.b)

```

I encountered the error after upgrading from Makie 0.22 to Makie 0.24. I believe Makie should have fixed this bug.

---

<div class="post-metadata">

**Author:** ![xor0110](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/xor0110/32/7926_2.png) [@xor0110](https://discourse.julialang.org/u/xor0110)\
**Post date:** [November 21, 2025, 2:39pm UTC](https://discourse.julialang.org/t/makie-error-methoderror-no-method-matching-create-dim-conversion-type-union-missing-float64-the-function-create-dim-conversion-exists-but-no-method-is-defined-for-this-combination-of-argument-types/131156/6 "2025-11-21T14:39:05Z")

</div>

> [@dk-zen](#):
>
> ```julia-auto
> import Makie: create_dim_conversion
> 
> create_dim_conversion(union_typ::Type{Union{Missing,T}}) where {T<:Real} =
> create_dim_conversion(union_typ.b)
> 
> ```

Thanks, I had an issue plotting a second curve in a graph with a DateTime xaxis, this fixed it. I’m using GLMakie 0.13.6 and Makie 0.24.6.