# CSV compile error in Julia-1.0

**URL:** <https://discourse.julialang.org/t/csv-compile-error-in-julia-1-0/14933>\
**Category:** General Usage\
**Created:** [September 14, 2018, 4:36am UTC](https://discourse.julialang.org/t/csv-compile-error-in-julia-1-0/14933 "2018-09-14T04:36:12Z")\
**Posts on this page:** 7\
**Page:** 1

<div class="post-metadata">

**Author:** ![Ajaychat3](https://avatars.discourse-cdn.com/v4/letter/a/ecd19e/32.png) [@Ajaychat3](https://discourse.julialang.org/u/Ajaychat3)\
**Post date:** [September 14, 2018, 4:36am UTC](https://discourse.julialang.org/t/csv-compile-error-in-julia-1-0/14933/1 "2018-09-14T04:36:12Z")

</div>

I am trying to compile CSV on julia-1.0 on win 10 and the following error gets thrown. Am I doing something wrong?

```julia
┌ Info: Precompiling CSV [336ed68f-0bac-5ca0-87d4-7b16caf5d00b]
└ @ Base loading.jl:1186
ERROR: LoadError: LoadError: UndefVarError: T not defined
Stacktrace:
 [1] top-level scope at none:0
 [2] include at .\boot.jl:317 [inlined]
 [3] include_relative(::Module, ::String) at .\loading.jl:1038
 [4] include at .\sysimg.jl:29 [inlined]
 [5] include(::String) at C:\Users\chatura\.julia\packages\DataArrays\XA0R7\src\DataArrays.jl:3
 [6] top-level scope at none:0
 [7] include at .\boot.jl:317 [inlined]
 [8] include_relative(::Module, ::String) at .\loading.jl:1038
 [9] include(::Module, ::String) at .\sysimg.jl:29
 [10] top-level scope at none:2
 [11] eval at .\boot.jl:319 [inlined]
 [12] eval(::Expr) at .\client.jl:389
 [13] top-level scope at .\none:3
in expression starting at C:\Users\chatura\.julia\packages\DataArrays\XA0R7\src\natype.jl:64
in expression starting at C:\Users\chatura\.julia\packages\DataArrays\XA0R7\src\DataArrays.jl:58
ERROR: LoadError: Failed to precompile DataArrays [0fe7c1db-08c2-54a3-a222-6d1d3b7a471a] to C:\Users\chatura\.julia\compiled\v1.0\DataArrays\ZAWTY.ji.
Stacktrace:
 [1] error(::String) at .\error.jl:33
 [2] macro expansion at .\logging.jl:313 [inlined]
 [3] compilecache(::Base.PkgId, ::String) at .\loading.jl:1184
 [4] _require(::Base.PkgId) at .\logging.jl:311
 [5] require(::Base.PkgId) at .\loading.jl:852
 [6] macro expansion at .\logging.jl:311 [inlined]
 [7] require(::Module, ::Symbol) at .\loading.jl:834
 [8] include at .\boot.jl:317 [inlined]
 [9] include_relative(::Module, ::String) at .\loading.jl:1038
 [10] include(::Module, ::String) at .\sysimg.jl:29
 [11] top-level scope at none:2
 [12] eval at .\boot.jl:319 [inlined]
 [13] eval(::Expr) at .\client.jl:389
 [14] top-level scope at .\none:3
in expression starting at C:\Users\chatura\.julia\packages\DataFrames\sIu4Q\src\DataFrames.jl:14
ERROR: LoadError: LoadError: Failed to precompile DataFrames [a93c6f00-e57d-5684-b7b6-d8193f3e46c0] to C:\Users\chatura\.julia\compiled\v1.0\DataFrames\AR9oZ.ji.
Stacktrace:
 [1] error(::String) at .\error.jl:33
 [2] macro expansion at .\logging.jl:313 [inlined]
 [3] compilecache(::Base.PkgId, ::String) at .\loading.jl:1184
 [4] _require(::Base.PkgId) at .\logging.jl:311
 [5] require(::Base.PkgId) at .\loading.jl:852
 [6] macro expansion at .\logging.jl:311 [inlined]
 [7] require(::Module, ::Symbol) at .\loading.jl:834
 [8] include at .\boot.jl:317 [inlined]
 [9] include_relative(::Module, ::String) at .\loading.jl:1038
 [10] include at .\sysimg.jl:29 [inlined]
 [11] include(::String) at C:\Users\chatura\.julia\packages\CSV\nbNiU\src\CSV.jl:1
 [12] top-level scope at none:0
 [13] include at .\boot.jl:317 [inlined]
 [14] include_relative(::Module, ::String) at .\loading.jl:1038
 [15] include(::Module, ::String) at .\sysimg.jl:29
 [16] top-level scope at none:2
 [17] eval at .\boot.jl:319 [inlined]
 [18] eval(::Expr) at .\client.jl:389
 [19] top-level scope at .\none:3
in expression starting at C:\Users\chatura\.julia\packages\CSV\nbNiU\src\deprecated.jl:1
in expression starting at C:\Users\chatura\.julia\packages\CSV\nbNiU\src\CSV.jl:353
Failed to precompile CSV [336ed68f-0bac-5ca0-87d4-7b16caf5d00b] to C:\Users\chatura\.julia\compiled\v1.0\CSV\HHBkp.ji.

Stacktrace:
 [1] error(::String) at .\error.jl:33
 [2] macro expansion at .\logging.jl:313 [inlined]
 [3] compilecache(::Base.PkgId, ::String) at .\loading.jl:1184
 [4] macro expansion at .\logging.jl:311 [inlined]
 [5] _require(::Base.PkgId) at .\loading.jl:941
 [6] require(::Base.PkgId) at .\loading.jl:852
 [7] macro expansion at .\logging.jl:311 [inlined]
 [8] require(::Module, ::Symbol) at .\loading.jl:834
 [9] top-level scope at In[4]:1

```

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<div class="post-metadata">

**Author:** ![nalimilan](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/nalimilan/32/147_2.png) [@nalimilan](https://discourse.julialang.org/u/nalimilan)\
**Post date:** [September 14, 2018, 4:17pm UTC](https://discourse.julialang.org/t/csv-compile-error-in-julia-1-0/14933/2 "2018-09-14T16:17:37Z")

</div>

It looks like you have a quite old version of CSV or DataFrames, since the new versions don’t depend on DataArrays. Can you post the output of `]status`? You can also try updating them.

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<div class="post-metadata">

**Author:** ![Ajaychat3](https://avatars.discourse-cdn.com/v4/letter/a/ecd19e/32.png) [@Ajaychat3](https://discourse.julialang.org/u/Ajaychat3)\
**Post date:** [September 14, 2018, 4:58pm UTC](https://discourse.julialang.org/t/csv-compile-error-in-julia-1-0/14933/3 "2018-09-14T16:58:30Z")

</div>

thanks  
here in the status

(v1.0) pkg\> status  
Status `C:\Users\chatura\.julia\environments\v1.0\Project.toml`  
[6e4b80f9] BenchmarkTools v0.4.1  
[eaca7b4f] BuildExecutable v0.1.2  
[336ed68f] CSV v0.4.0 #master ([https://github.com/JuliaData/CSV.jl.git](https://github.com/JuliaData/CSV.jl.git))  
[5ae59095] Colors v0.9.4  
[a93c6f00] DataFrames v0.10.1  
[7806a523] DecisionTree v0.8.1  
[7876af07] Example v0.5.1  
[5789e2e9] FileIO v1.0.1  
[f67ccb44] HDF5 v0.10.2  
[7073ff75] IJulia v1.11.1  
[4138dd39] JLD v0.8.3+ [`C:\Users\chatura\.julia\dev\JLD`]  
[033835bb] JLD2 v0.1.2  
[850e97f4] MachineLearning v0.0.3  
[eadc2687] Pandas v1.0.1  
[b98c9c47] Pipe v1.0.0  
[91a5bcdd] Plots v0.20.2  
[27ebfcd6] Primes v0.4.0  
[438e738f] PyCall v1.18.4  
[d330b81b] PyPlot v2.6.3  
[d9b503ff] Regression v0.3.0  
[3646fa90] ScikitLearn v0.3.0  
[6e75b9c4] ScikitLearnBase v0.4.1  
[9a3f8284] Random  
[10745b16] Statistics

Subsequently i did this and the same error get thrown

(v1.0) pkg\> build CSV  
Building SpecialFunctions → `C:\Users\chatura\.julia\packages\SpecialFunctions\KvXoO\deps\build.log`

julia\> using CSV  
[Info: Precompiling CSV [336ed68f-0bac-5ca0-87d4-7b16caf5d00b]  
ERROR: LoadError: LoadError: UndefVarError: T not defined  
Stacktrace:  
[1] top-level scope at none:0  
[2] include at .\boot.jl:317 [inlined] …

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<div class="post-metadata">

**Author:** ![quinnj](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/quinnj/32/11_2.png) [@quinnj](https://discourse.julialang.org/u/quinnj)\
**Post date:** [September 18, 2018, 6:04am UTC](https://discourse.julialang.org/t/csv-compile-error-in-julia-1-0/14933/4 "2018-09-18T06:04:38Z")

</div>

Your package directory seems to be weirdly out of date. I would recommend removing all packages and starting fresh, which will ensure only 1.0-compatible package versions get installed.

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<div class="post-metadata">

**Author:** ![Ajaychat3](https://avatars.discourse-cdn.com/v4/letter/a/ecd19e/32.png) [@Ajaychat3](https://discourse.julialang.org/u/Ajaychat3)\
**Post date:** [September 18, 2018, 6:15am UTC](https://discourse.julialang.org/t/csv-compile-error-in-julia-1-0/14933/5 "2018-09-18T06:15:47Z")

</div>

Thanks quinnj. I will do as suggested and inform the outcome.

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<div class="post-metadata">

**Author:** ![Ajaychat3](https://avatars.discourse-cdn.com/v4/letter/a/ecd19e/32.png) [@Ajaychat3](https://discourse.julialang.org/u/Ajaychat3)\
**Post date:** [September 18, 2018, 10:18am UTC](https://discourse.julialang.org/t/csv-compile-error-in-julia-1-0/14933/6 "2018-09-18T10:18:26Z")

</div>

Thanks quinnj. CSV is now compiling.

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<div class="post-metadata">

**Author:** ![Ajaychat3](https://avatars.discourse-cdn.com/v4/letter/a/ecd19e/32.png) [@Ajaychat3](https://discourse.julialang.org/u/Ajaychat3)\
**Post date:** [September 26, 2018, 12:25pm UTC](https://discourse.julialang.org/t/csv-compile-error-in-julia-1-0/14933/7 "2018-09-26T12:25:38Z")

</div>

CSV@0.3.1 is working fine on my Win 10 PC with Julia 1.0. When I do package update it move to CSV@0.4.0 and removes InternedStrings package. However CSV fails to compile. I then revert back to CSV@0.3.1 (with InternedStrings package reinstalled) and its works fine.