'parpool(2)' fails

[OptHuang]

Strange bug occurs when I am testing parpool(2) on MATLAB R2021b, R2022a, and R2022b as follows.

---

Error using parpool
Undefined function 'pCurrentTaskIsPartOfAPool' for input arguments of type
'double'.

Error in command_a74dfc76_b474_49c5_94e1_8e53283cd400 (line 1)
cd(getenv('MW_ORIG_WORKING_FOLDER'));parpool(2)

---

Reproduction workflow:

name: test parallel computing toolbox

on:
  push:
    branches: [matlab]

jobs:

  test:

    name: MATLAB ${{ matrix.matlab }} on ${{ matrix.os }}
    runs-on: ${{ matrix.os }}

    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest, windows-latest, macOS-latest]
        matlab: [latest, R2021b, R2022a, R2022b, R2023a, R2023b]

    steps:

      - name: Check out repository
        uses: actions/checkout@v4

      - name: Set up MATLAB with optimization toolbox and parallel computing toolbox
        uses: matlab-actions/setup-matlab@v2
        with:
          release: ${{ matrix.matlab }}
          cache: true
          products: Optimization_Toolbox Parallel_Computing_Toolbox

      - name: Test parallel computing
        uses: matlab-actions/[email protected]
        with:
          command: |
            parpool(2)

[mcafaro]

Thanks for bringing this issue to our attention, @OptHuang. I have successfully reproduced the problem and forwarded the details to the relevant team. I will keep you updated with any progress or developments.

[OptHuang]

@mcafaro Thanks for the attention!