MATLAB.MEngineError("failed to put variable A into MATLAB session (err = 1)")

[dhtantoy]

I met an issue when I relegated the program to the background using nohup.

ERROR: LoadError: MATLAB.MEngineError("failed to put variable A into MATLAB session (err = 1)")
Stacktrace:
  [1] put_variable(session::MATLAB.MSession, name::Symbol, v::MATLAB.MxArray)
    @ MATLAB ~/.julia/packages/MATLAB/xBhSu/src/engine.jl:153
  [2] put_variable
    @ ~/.julia/packages/MATLAB/xBhSu/src/engine.jl:157 [inlined]
  [3] ......

I need to frequently input a matrix A and vector b into the MATLAB session for resolution. The code is like

function (solver::MatlabSolver)(A, b)
    # `solver` has a field `s` which is an MSession
    put_variable(solver.s, :A, A)
    put_variable(solver.s, :b, b)
    eval_string(solver.s, "u = A \\ b;")
    uh = get_mvariable(solver.s, :u) |> jvector
    return uh
end

Everything began smoothly, but when I relegated the program to the background, the aforementioned issue would manifest after approximately several dozen iterations.
Matlab version:

MATLAB Version: 9.11.0.1809720 (R2021b) Update 1
MATLAB License Number: xxx
Operating System: Linux 5.14.0-70.26.1.el9_0.x86_64 #1 SMP PREEMPT Tue Sep 20 17:53:31 UTC 2022 x86_64
Java Version: Java 1.8.0_202-b08 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode

julia version:

julia version 1.10.2

MATLAB.jl version:

[10e44e05] MATLAB v0.8.4

[tqml]

Hey @dhtantoy !
How large are the matrices that you put into MATLAB? There is a 2GB limit (see #154).
Are you using multiple threads? The matlab engine is not threadsafe, so in this case you would need to take care of that.

[dhtantoy]

Thank you for your response. I'm sorry, but I am unable to reproduce the issue I had at that time.
I would close this issue.