# Parallel use of Julia 0.7 and 1.0

**URL:** <https://discourse.julialang.org/t/parallel-use-of-julia-0-7-and-1-0/15785>\
**Category:** General Usage\
**Created:** [October 2, 2018, 12:50pm UTC](https://discourse.julialang.org/t/parallel-use-of-julia-0-7-and-1-0/15785 "2018-10-02T12:50:58Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![Moses](https://avatars.discourse-cdn.com/v4/letter/m/278dde/32.png) [@Moses](https://discourse.julialang.org/u/Moses)\
**Post date:** [October 2, 2018, 12:50pm UTC](https://discourse.julialang.org/t/parallel-use-of-julia-0-7-and-1-0/15785/1 "2018-10-02T12:50:58Z")

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Hi.

Is there any way to use versions 0.7.0 and 1.0.0/1.0.1 on the same computer (Windows 8.1 Pro with Atom/Juno) in parallel?

I have some old code of 0.6, which I need to transfer, so I need version 0.7 for the deprecation warnings.  
But my new projects should be v1.0 from the start.

Currently, I have to switch the environment variable JULIA\_BINDIR every time I want to switch between 0.7 and 1.0.  
Version 0.6 works fine together with the others, because it relies on JULIA\_HOME, which is no longer used.

Thanks in advance.

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**Author:** ![Ajaychat3](https://avatars.discourse-cdn.com/v4/letter/a/ecd19e/32.png) [@Ajaychat3](https://discourse.julialang.org/u/Ajaychat3)\
**Post date:** [October 2, 2018, 6:59pm UTC](https://discourse.julialang.org/t/parallel-use-of-julia-0-7-and-1-0/15785/2 "2018-10-02T18:59:36Z")

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As a Julia user, I use win 10 and have both versions 0.7 and 1.0 installed. And I am able to use without resetting the binder variable. I can open two separate instances of Julia simultaneously so don’t understand the reason behind resetting the binder environment variable.

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**Author:** ![js135005](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/js135005/32/8219_2.png) [@js135005](https://discourse.julialang.org/u/js135005)\
**Post date:** [October 2, 2018, 7:14pm UTC](https://discourse.julialang.org/t/parallel-use-of-julia-0-7-and-1-0/15785/3 "2018-10-02T19:14:21Z")

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Perhaps the issue is that if you have set a hard JULIA\_BINDIR environment variable, you will have to manually change it to switch. If you allow it to be defined implicitly, then you can have different Julia executables, each of which will do its own implicit definition.

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**Author:** ![Moses](https://avatars.discourse-cdn.com/v4/letter/m/278dde/32.png) [@Moses](https://discourse.julialang.org/u/Moses)\
**Post date:** [October 3, 2018, 10:59am UTC](https://discourse.julialang.org/t/parallel-use-of-julia-0-7-and-1-0/15785/4 "2018-10-03T10:59:24Z")

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@Ajaychat3 Did you install into the default location (User-folder)? I did not do that, because I am in a corporate environment where populating the user folder with 10s of thousands of files severly slows down login/logout procedures.

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**Author:** ![Moses](https://avatars.discourse-cdn.com/v4/letter/m/278dde/32.png) [@Moses](https://discourse.julialang.org/u/Moses)\
**Post date:** [October 3, 2018, 11:00am UTC](https://discourse.julialang.org/t/parallel-use-of-julia-0-7-and-1-0/15785/5 "2018-10-03T11:00:22Z")

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@js135005 How would I perform an implicit definition?

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**Author:** ![Ajaychat3](https://avatars.discourse-cdn.com/v4/letter/a/ecd19e/32.png) [@Ajaychat3](https://discourse.julialang.org/u/Ajaychat3)\
**Post date:** [October 3, 2018, 12:04pm UTC](https://discourse.julialang.org/t/parallel-use-of-julia-0-7-and-1-0/15785/6 "2018-10-03T12:04:29Z")

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@Moses: Yes I installed it to the default location. I am also on corporate environment but I don’t see any lag in login/logout timing.

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**Author:** ![Moses](https://avatars.discourse-cdn.com/v4/letter/m/278dde/32.png) [@Moses](https://discourse.julialang.org/u/Moses)\
**Post date:** [October 3, 2018, 6:04pm UTC](https://discourse.julialang.org/t/parallel-use-of-julia-0-7-and-1-0/15785/7 "2018-10-03T18:04:29Z")

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@Ajaychat3 Lucky you. 😀  
Our network and servers are pretty old and as the user folder gets synchronised on every login/logout, installation of julia into the user folder severly slows down the process (I had it installed there initially as well, but then one computer restart took 20 minutes).

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**Author:** ![Ajaychat3](https://avatars.discourse-cdn.com/v4/letter/a/ecd19e/32.png) [@Ajaychat3](https://discourse.julialang.org/u/Ajaychat3)\
**Post date:** [October 4, 2018, 1:07am UTC](https://discourse.julialang.org/t/parallel-use-of-julia-0-7-and-1-0/15785/8 "2018-10-04T01:07:34Z")

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There is no synchronisation of user folders in our case. Synchronisation is basically for backup purposes as I understand. You can explore whether this can be disabled at startup subject to organisation policies.