Problems in installing package MAT

New to Julia
1

Hi I am trying to download the package MAT in Julia 0.64 with the command Pkg.add(“MAT”)
I did it other times in other PC with no issues but this time is giving me the following error:

ERROR: SystemError: realpath: No such file or directory

#systemerror#44 at ./error.jl:64 [inlined]

systemerror(::Symbol, ::Bool) at ./error.jl:64

realpath(::String) at ./path.jl:311

mkcachedir() at ./pkg/cache.jl:23

prefetch(::String, ::String, ::Array{String,1}) at ./pkg/cache.jl:35

resolve(::Dict{String,Base.Pkg.Types.VersionSet}, ::Dict{String,Dict{VersionNumber,Base.Pkg.Types.Available}}, ::Dict{String,Tuple{VersionNumber,Bool}}, ::Dict{String,Base.Pkg.Types.Fixed}, ::Dict{String,VersionNumber}, ::Set{String}) at ./pkg/entry.jl:518

resolve(::Dict{String,Base.Pkg.Types.VersionSet}, ::Dict{String,Dict{VersionNumber,Base.Pkg.Types.Available}}, ::Dict{String,Tuple{VersionNumber,Bool}}, ::Dict{String,Base.Pkg.Types.Fixed}) at ./pkg/entry.jl:479

edit(::Function, ::String, ::Base.Pkg.Types.VersionSet, ::Vararg{Base.Pkg.Types.VersionSet,N} where N) at ./pkg/entry.jl:30

(::Base.Pkg.Entry.##1#3{String,Base.Pkg.Types.VersionSet})() at ./task.jl:335

Stacktrace:

[1] sync_end() at ./task.jl:287

[2] macro expansion at ./task.jl:303 [inlined]

[3] add( ::String, ::Base.Pkg.Types.VersionSet ) at ./pkg/entry.jl:51

[4] (::Base.Pkg.Dir.##4#7{Array{Any,1},Base.Pkg.Entry.#add,Tuple{String}})() at ./pkg/dir.jl:36

[5] cd( ::Base.Pkg.Dir.##4#7{Array{Any,1},Base.Pkg.Entry.#add,Tuple{String}}, ::String ) at ./file.jl:70

[6] #cd#1( ::Array{Any,1}, ::Function, ::Function, ::String, ::Vararg{String,N} where N ) at ./pkg/dir.jl:36

[7] add( ::String ) at ./pkg/pkg.jl:117

Someone can help?
Thanks in advance.

2

I’m afraid that it will be difficult to get help with such an old version of Julia (I guess you mean 0.6.4).

I’d suggest, if possible, to move to a newer Julia version.

3

Hi thanks for reply.
Yes this is the version, the problem is that I have a really long code written in that version that is incompatible with newer ones…there is no way to get around the problem?

4

You could also try with Julia 0.7, which (IIRC) should be able to run code for 0.6, with some warnings.

MAT.jl was a bit tricky, and wasn’t updated for a while then. You might want to try cloning it, and checking out a particular tagged version by hand.

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