System error:Shar​edMemory:g​etCurrentU​ser:getlog​in_r:error​=25 on wsl when connecting to Matlab from C++ with matlab::en​gine::conn​ectMATLAB(​)

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Kyösti Alkio
Kyösti Alkio 2022-9-14
评论： Raghav Bansal 2023-12-26
I'm using C++ to run a MATLAB script. The code is simple:
std::cout << "Starting matlab" << std::endl;
matlab = matlab::engine::startMATLAB();
std::cout << "matlab started, connecting to matlab" << std::endl;
matlab::engine::connectMATLAB();
std::cout << "Connected to MATLAB" << std::endl;
MATLAB can be started, but not connected to. I never reach the last line of the code. Instead, I receive the following error:
terminate called after throwing an instance of 'std::runtime_error'
what(): System error:SharedMemory:getCurrentUser:getlogin_r:error=25
I have MATLAB installed and include
#include "MatlabDataArray.hpp"
#include "MatlabEngine.hpp"
This is most likely somehow related to the fact that I'm running this on WSL (kernel 5.10.16.3-microsoft-standard-WSL2). The same code works on a real Ubuntu 20.04 (not wsl).
Not sure if related, but always the first time I start MATLAB from WSL after a reboot of WSL, I need to reactivate it.
The host machine I'm using runs on Windows 11.
  1 个评论
Raghav Bansal
Raghav Bansal 2023-12-26
I think similar issue was resolved in the latest release of the MATLAB i.e. R2023b. You may try to install the latest release and check if the issue still persists.

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