# Problem in running Julia on Juno

**URL:** <https://discourse.julialang.org/t/problem-in-running-julia-on-juno/35412>\
**Category:** New to Julia\
**Created:** [March 2, 2020, 2:52pm UTC](https://discourse.julialang.org/t/problem-in-running-julia-on-juno/35412 "2020-03-02T14:52:48Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![Darione](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/darione/32/12160_2.png) [@Darione](https://discourse.julialang.org/u/Darione)\
**Post date:** [March 2, 2020, 4:31pm UTC](https://discourse.julialang.org/t/problem-in-running-julia-on-juno/35412/3 "2020-03-02T16:31:14Z")

</div>

Ok, reinstalled Taro … oh, it’s this one JULIA\_COPY\_STACKS, that i manually added so system environment variabile (i have windows 10).

```julia
julia> import Taro
[Info: Precompiling Taro [61d0e4fa-4e73-5030-88a9-ae4c27b203dd]
┌ Warning: JavaCall needs the environment variable `JULIA_COPY_STACKS` to be `1` or `yes`.
│ Calling the JVM may result in undefined behavior.
└ @ JavaCall C:\Users\dario\.julia\packages\JavaCall\0wJQZ\src\JavaCall.jl:38
┌ Warning: JavaCall needs the environment variable `JULIA_COPY_STACKS` to be `1` or `yes`.
│ Calling the JVM may result in undefined behavior.
└ @ JavaCall C:\Users\dario\.julia\packages\JavaCall\0wJQZ\src\JavaCall.jl:38

```

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