UndefRefError after upgrading Matlab

[bantin]

I just upgraded to Matlab 2018b. I changed my MATLAB_HOME environment variable to the new path, and I can confirm that Julia can see the new path, because running get(ENV, "MATLAB_HOME", "") returns "/Applications/MATLAB_R2018b.app" as expected.

However, I can't access any functionality from MATLAB.jl. Simply running @mput with any variable gives the following error.

julia> @mput a
ERROR: UndefRefError: access to undefined reference
Stacktrace:
 [1] (::getfield(MATLAB, Symbol("##MSession#11#12")))(::String, ::Type, ::Int64) at /Users/Bantin/.julia/packages/MATLAB/SljED/src/engine.jl:26
 [2] Type at /Users/Bantin/.julia/packages/MATLAB/SljED/src/engine.jl:23 [inlined] (repeats 2 times)
 [3] get_default_msession at /Users/Bantin/.julia/packages/MATLAB/SljED/src/engine.jl:88 [inlined]
 [4] put_variable(::Symbol, ::Int64) at /Users/Bantin/.julia/packages/MATLAB/SljED/src/engine.jl:159
 [5] top-level scope at none:0

I'm using Julia 1.0 on Mac OSX Yosemite.

[musm]

which matlab.jl version ?

[musm]

Try first
pkg> up
then test and if that doesn't work, try
pkg> build MATLAB

[bantin]

Hi @musm,

I'm using matlab.jl v0.7.1.

Running the test gives the following error:

ERROR: LoadError: InitError: MATLAB.jl built with version at exec /Applications/MATLAB_R2014a.app/bin/matlab, but detected new installation at exec /Applications/MATLAB_R2018b.app/bin/matlab.
Run `import Pkg; Pkg.build("MATLAB")` and restart Julia.

However, after following the instructions by building the package and restarting Julia, I still get the same error when I run the test.

[bantin]

Yes, I did restart Julia but that didn't fix it.

What did fix it was the following: I removed the package using Pkg.rm and also removed all of the associated .jl files. Then I re-added the package using Pkg. Now the tests pass.

I think the issue then is that maybe running Pkg.build and restarting Julia doesn't always resolve the InitError, but this might be a special case because I updated my MATLAB version. Either way, feel free to close the issue if you don't think it needs any action.

[musm]

very strange, updating matlab and running pkg> build MATLAB should have updated the old reference. Which should trigger a precompilation and update everything.

[musm]

Ok I think I see the issue build MATLAB doesn't update the precompile cache.

[Batmanabcdefg]

@musm

the same issue now ..............

[sadda]

What solved this issue for me was

pkg> build HDF5

as suggested in #164