# Face this run time error
**URL:** https://discourse.julialang.org/t/face-this-run-time-error/32418
**Category:** General Usage
**Created:** [December 18, 2019, 1:52am UTC](https://discourse.julialang.org/t/face-this-run-time-error/32418 "2019-12-18T01:52:11Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@imrankhan\_juliaLang](https://discourse.julialang.org/u/imrankhan_juliaLang)
#### Post date: [December 18, 2019, 1:52am UTC](https://discourse.julialang.org/t/face-this-run-time-error/32418/1 "2019-12-18T01:52:11Z")
I face this error in MJL pakage
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### Author:  [@nilshg](https://discourse.julialang.org/u/nilshg)
#### Post date: [December 18, 2019, 11:07am UTC](https://discourse.julialang.org/t/face-this-run-time-error/32418/2 "2019-12-18T11:07:31Z")
Which version of MLJ are you on? You seem to roughly be running the intro example from the docs, which runs fine for me on MLJ version 0.6:
```julia
julia> using MLJ, RDatasets
julia> iris = dataset("datasets", "iris");
julia> y, X = unpack(iris, ==(:Species), colname -> true);
julia> tree_model = @load DecisionTreeClassifier verbosity = 1
import MLJModels ✔
import DecisionTree ✔
import MLJModels.DecisionTree_.DecisionTreeClassifier ✔
DecisionTreeClassifier(pruning_purity = 1.0,
max_depth = -1,
min_samples_leaf = 1,
min_samples_split = 2,
min_purity_increase = 0.0,
n_subfeatures = 0,
display_depth = 5,
post_prune = false,
merge_purity_threshold = 0.9,
pdf_smoothing = 0.05,) @ 1…93
julia> tree = machine(tree_model, X, y)
Machine{DecisionTreeClassifier} @ 4…03
```
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### Author:  [@imrankhan\_juliaLang](https://discourse.julialang.org/u/imrankhan_juliaLang)
#### Post date: [December 18, 2019, 2:43pm UTC](https://discourse.julialang.org/t/face-this-run-time-error/32418/3 "2019-12-18T14:43:15Z")
Now its show this error on my data
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### Author:  [@nilshg](https://discourse.julialang.org/u/nilshg)
#### Post date: [December 18, 2019, 4:34pm UTC](https://discourse.julialang.org/t/face-this-run-time-error/32418/4 "2019-12-18T16:34:46Z")
Could you maybe post an [MWE](https://discourse.julialang.org/t/psa-make-it-easier-to-help-you/14757) that reproduces your error as in the linked post? This would make it a lot more likely that someone on this forum can work out what’s going awry in your code.