Pycall Package install error

General Usage
1

Hello everyone, I am trying to call cantera (a python package) from Julia using PyCall, however when I run

Pkg.add("PyCall");

I get the following error:

Resolving package versions...
ERROR: Unsatisfiable requirements detected for package TreeViews [a2a6695c]:
 TreeViews [a2a6695c] log:
 ├─TreeViews [a2a6695c] has no known versions!
 └─found to have no compatible versions left with Atom [c52e3926] 
   └─Atom [c52e3926] log:
     ├─possible versions are: [0.8.0-0.8.8, 0.9.0-0.9.1, 0.10.0-0.10.2, 0.11.0-0.11.3, 0.12.0-0.12.28] or uninstalled
     └─restricted to versions * by an explicit requirement, leaving only versions [0.8.0-0.8.8, 0.9.0-0.9.1, 0.10.0-0.10.2, 0.11.0-0.11.3, 0.12.0-0.12.28]
Stacktrace:
 [1] propagate_constraints!(::Pkg.Resolve.Graph, ::Set{Int64}; log_events::Bool) at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\Resolve\graphtype.jl:1005
 [2] propagate_constraints! at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\Resolve\graphtype.jl:946 [inlined] (repeats 2 times)
 [3] simplify_graph!(::Pkg.Resolve.Graph, ::Set{Int64}; clean_graph::Bool) at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\Resolve\graphtype.jl:1460
 [4] simplify_graph! at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\Resolve\graphtype.jl:1460 [inlined] (repeats 2 times)
 [5] resolve_versions!(::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}) at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\Operations.jl:375
 [6] targeted_resolve at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\Operations.jl:1114 [inlined]
 [7] tiered_resolve(::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}) at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\Operations.jl:1100
 [8] _resolve at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\Operations.jl:1120 [inlined]
 [9] add(::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}, ::Array{Base.UUID,1}; preserve::Pkg.Types.PreserveLevel, platform::Pkg.BinaryPlatforms.Windows) at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\Operations.jl:1135
 [10] add(::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}; preserve::Pkg.Types.PreserveLevel, platform::Pkg.BinaryPlatforms.Windows, kwargs::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}) at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:188
 [11] add(::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}) at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:139
 [12] #add#21 at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:67 [inlined]
 [13] add at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:67 [inlined]
 [14] #add#20 at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:66 [inlined]
 [15] add at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:66 [inlined]
 [16] add(::String; kwargs::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}) at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:65
 [17] add(::String) at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:65
 [18] top-level scope at none:1

Any help on this? Thanks a lot in advance.

2

Looks like you have a problem with an unrelated package? What is Pkg.status()?

3

@stevengj I assumed there was an install error with Julia on my system so I reinstalled it and tried. Pkg.status() gives the following:

Status `C:\Users\hi\.julia\environments\v1.5\Project.toml`
  [c52e3926] Atom v0.12.24
  [0c46a032] DifferentialEquations v6.15.0
  [e5e0dc1b] Juno v0.8.4
  [91a5bcdd] Plots v1.7.3

And after reinstalling Julia once again, Pkg.add("PyCall") gives:

ERROR: SystemError: opening file "C:\\Users\\hi\\.julia\\registries\\General\\Registry.toml": No such file or directory
Stacktrace:
 [1] systemerror(::String, ::Int32; extrainfo::Nothing) at .\error.jl:168
 [2] #systemerror#48 at .\error.jl:167 [inlined]
 [3] systemerror at .\error.jl:167 [inlined]
 [4] open(::String; lock::Bool, read::Nothing, write::Nothing, create::Nothing, truncate::Nothing, append::Nothing) at .\iostream.jl:284
 [5] open at .\iostream.jl:273 [inlined]
 [6] open(::Base.var"#294#295"{Tuple{}}, ::String; kwargs::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}) at .\io.jl:323
 [7] open at .\io.jl:323 [inlined]
 [8] read at .\io.jl:408 [inlined]
 [9] parsefile at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\ext\TOML\src\TOML.jl:50 [inlined]
 [10] read_registry(::String; cache::Bool) at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\Types.jl:1044
 [11] read_registry at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\Types.jl:1039 [inlined]
 [12] (::Pkg.Types.var"#94#97"{Pkg.Types.Context,String,Pkg.Types.RegistrySpec})(::String) at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\Types.jl:1016
 [13] mktempdir(::Pkg.Types.var"#94#97"{Pkg.Types.Context,String,Pkg.Types.RegistrySpec}, ::String; prefix::String) at .\file.jl:709
 [14] mktempdir at .\file.jl:707 [inlined] (repeats 2 times)
 [15] clone_or_cp_registries(::Pkg.Types.Context, ::Array{Pkg.Types.RegistrySpec,1}, ::String) at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\Types.jl:980
 [16] clone_or_cp_registries at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\Types.jl:973 [inlined]
 [17] clone_default_registries(::Pkg.Types.Context; only_if_empty::Bool) at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\Types.jl:874
 [18] clone_default_registries at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\Types.jl:862 [inlined]
 [19] find_registered!(::Pkg.Types.Context, ::Array{String,1}, ::Array{Base.UUID,1}) at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\Types.jl:1239
 [20] registry_resolve!(::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}) at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\Types.jl:770
 [21] add(::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}; preserve::Pkg.Types.PreserveLevel, platform::Pkg.BinaryPlatforms.Windows, kwargs::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}) at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:175
 [22] add(::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}) at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:139
 [23] #add#21 at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:67 [inlined]
 [24] add at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:67 [inlined]
 [25] #add#20 at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:66 [inlined]
 [26] add at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:66 [inlined]
 [27] add(::String; kwargs::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}) at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:65
 [28] add(::String) at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:65
 [29] top-level scope at none:1

Thank you for your time

4

I’m not sure what you did, but it sounds like you messed up your installation. Probably easiest to delete the whole C:\Users\hi\.julia directory and then re-do

pkg> add Atom DifferentialEquations Juno Plots PyCall

at the pkg> prompt (type ] in the REPL to get this prompt).

1 Like
5

Many thanks. There was an error with my previous installations.