# Installing ROS.jl error

**URL:** <https://discourse.julialang.org/t/installing-ros-jl-error/74665>\
**Category:** New to Julia\
**Tags:** cxx\
**Created:** [January 15, 2022, 12:53pm UTC](https://discourse.julialang.org/t/installing-ros-jl-error/74665 "2022-01-15T12:53:01Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![kobied](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/kobied/32/16432_2.png) [@kobied](https://discourse.julialang.org/u/kobied)\
**Post date:** [January 15, 2022, 12:53pm UTC](https://discourse.julialang.org/t/installing-ros-jl-error/74665/1 "2022-01-15T12:53:01Z")

</div>

Hi, I’m trying to install `ROS.jl`.  
After adding the package using `pkg> add ROS` and calling `using ROS`, I get the following error:

```julia
julia> using ROS
[Info: Precompiling ROS [a492bfac-16cc-4d50-a8b6-f03352b6b563]
[Info: Skipping precompilation since __precompile__ (false). Importing ROS [a492bfac-16cc-4d50-a8b6-f03352b6b563].
[Info: Precompiling Cxx [a0b5b9ef-44b7-5148-a2d1-f6db19f3c3d2]
ERROR: LoadError: could not load library "C:\Users\kedel\.julia\packages\Cxx\1RaOv\src\..\deps\usr\bin\libcxxffi"
The specified procedure could not be found.
Stacktrace:
  [1] dlopen(s::String, flags::UInt32; throw_error::Bool)
    @ Base.Libc.Libdl .\libdl.jl:117
  [2] dlopen
    @ .\libdl.jl:117 [inlined]
  [3] init_libcxxffi()
    @ Cxx.CxxCore C:\Users\kedel\.julia\packages\Cxx\1RaOv\src\initialization.jl:23
  [4] top-level scope
    @ C:\Users\kedel\.julia\packages\Cxx\1RaOv\src\initialization.jl:25
  [5] include(mod::Module, _path::String)
    @ Base .\Base.jl:418
  [6] include(x::String)
    @ Cxx.CxxCore C:\Users\kedel\.julia\packages\Cxx\1RaOv\src\Cxx.jl:144
  [7] top-level scope
    @ C:\Users\kedel\.julia\packages\Cxx\1RaOv\src\Cxx.jl:170
  [8] include
    @ .\Base.jl:418 [inlined]
  [9] include_package_for_output(pkg::Base.PkgId, input::String, depot_path::Vector{String}, dl_load_path::Vector{String}, load_path::Vector{String}, concrete_deps::Vector{Pair{Base.PkgId, UInt64}}, source::String)
    @ Base .\loading.jl:1318
 [10] top-level scope
    @ none:1
 [11] eval
    @ .\boot.jl:373 [inlined]
 [12] eval(x::Expr)
    @ Base.MainInclude .\client.jl:453
 [13] top-level scope
    @ none:1
in expression starting at C:\Users\kedel\.julia\packages\Cxx\1RaOv\src\initialization.jl:25
in expression starting at C:\Users\kedel\.julia\packages\Cxx\1RaOv\src\Cxx.jl:142
ERROR: LoadError: Failed to precompile Cxx [a0b5b9ef-44b7-5148-a2d1-f6db19f3c3d2] to C:\Users\kedel\.julia\compiled\v1.7\Cxx\jl_4E50.tmp.
Stacktrace:
  [1] error(s::String)
    @ Base .\error.jl:33
  [2] compilecache(pkg::Base.PkgId, path::String, internal_stderr::IO, internal_stdout::IO, ignore_loaded_modules::Bool)
    @ Base .\loading.jl:1466
  [3] compilecache(pkg::Base.PkgId, path::String)
    @ Base .\loading.jl:1410
  [4] _require(pkg::Base.PkgId)
    @ Base .\loading.jl:1120
  [5] require(uuidkey::Base.PkgId)
    @ Base .\loading.jl:1013
  [6] require(into::Module, mod::Symbol)
    @ Base .\loading.jl:997
  [7] include
    @ .\Base.jl:418 [inlined]
  [8] _require(pkg::Base.PkgId)
    @ Base .\loading.jl:1149
  [9] require(uuidkey::Base.PkgId)
    @ Base .\loading.jl:1013
 [10] require(into::Module, mod::Symbol)
    @ Base .\loading.jl:997
 [11] eval
    @ .\boot.jl:373 [inlined]
 [12] eval
    @ .\Base.jl:68 [inlined]
 [13] repleval(m::Module, code::Expr, #unused#::String)
    @ VSCodeServer c:\Users\kedel\.vscode\extensions\julialang.language-julia-1.5.9\scripts\packages\VSCodeServer\src\repl.jl:157
 [14] (::VSCodeServer.var"#71#73"{Module, Expr, REPL.LineEditREPL, REPL.LineEdit.Prompt})()
    @ VSCodeServer c:\Users\kedel\.vscode\extensions\julialang.language-julia-1.5.9\scripts\packages\VSCodeServer\src\repl.jl:123
 [15] with_logstate(f::Function, logstate::Any)
    @ Base.CoreLogging .\logging.jl:511
 [16] with_logger
    @ .\logging.jl:623 [inlined]
 [17] (::VSCodeServer.var"#70#72"{Module, Expr, REPL.LineEditREPL, REPL.LineEdit.Prompt})()
    @ VSCodeServer c:\Users\kedel\.vscode\extensions\julialang.language-julia-1.5.9\scripts\packages\VSCodeServer\src\repl.jl:124
 [18] #invokelatest#2
    @ .\essentials.jl:716 [inlined]
 [19] invokelatest(::Any)
    @ Base .\essentials.jl:714
 [20] macro expansion
    @ c:\Users\kedel\.vscode\extensions\julialang.language-julia-1.5.9\scripts\packages\VSCodeServer\src\eval.jl:34 [inlined]
 [21] (::VSCodeServer.var"#55#56")()
    @ VSCodeServer .\task.jl:423
in expression starting at C:\Users\kedel\.julia\packages\ROS\AQF9s\src\ROS.jl:2

```

I tried to install the `Cxx.jl` package separately and then build the `ROS.jl` again but I still get the same error.

can someone help me?  
thanks in ahead

---

<div class="post-metadata">

**Author:** ![ufechner7](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/ufechner7/32/51363_2.png) [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Post date:** [January 15, 2022, 2:14pm UTC](https://discourse.julialang.org/t/installing-ros-jl-error/74665/2 "2022-01-15T14:14:21Z")

</div>

Which Julia version do you use?

I think Cxx.jl does not work with Julia 1.7.

**Please, note that Cxx.jl only works (out of the box) currently with Julia 1.1.x to 1.3.x, i.e. with no currently supported Julia, while those versions can still be downloaded at [Julialang.org](http://Julialang.org).**

So just install Julia 1.3 …

You can use different versions of Julia per project with the help of [GitHub - johnnychen94/jill.py: A cross-platform installer for the Julia programming language](https://github.com/johnnychen94/jill.py)

---

<div class="post-metadata">

**Author:** ![kobied](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/kobied/32/16432_2.png) [@kobied](https://discourse.julialang.org/u/kobied)\
**Post date:** [January 15, 2022, 2:51pm UTC](https://discourse.julialang.org/t/installing-ros-jl-error/74665/3 "2022-01-15T14:51:34Z")

</div>

thank you for the quick reply, I do use julia 1.7.  
I’ll change to 1.3 as you advised.

---

<div class="post-metadata">

**Author:** ![Gnimuc](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/gnimuc/32/2194_2.png) [@Gnimuc](https://discourse.julialang.org/u/Gnimuc)\
**Post date:** [January 15, 2022, 3:47pm UTC](https://discourse.julialang.org/t/installing-ros-jl-error/74665/4 "2022-01-15T15:47:13Z")

</div>

I don’t think you can use Cxx.jl on Windows regardless of the Julia version.