pymapdl installation verification not possible

[herttim]

By starting MAPDL from Python by running the following prompt, a Value Error in Python appears.

from ansys.mapdl.core import launch_mapdl
mapdl = launch_mapdl()

Steps to reproduce the behavior:

1. Install pyansys with pip install ansys.mapdl.core in anaconda prompt (Anaconda3)
2. Go to Spyder Python and type the prompt from ansys.mapdl.core import launch_mapdl mapdl = launch_mapdl()
3. See error

Appeared error:

Traceback (most recent call last):

  File "C:\Users\...\.spyder-py3\untitled2.py", line 8, in <module>
    from ansys.mapdl.core import launch_mapdl

  File "C:\Users\...\Anaconda\lib\site-packages\ansys\mapdl\core\__init__.py", line 26, in <module>
    from ansys.mapdl.core.launcher import (

  File "C:\Users\...\Anaconda\lib\site-packages\ansys\mapdl\core\launcher.py", line 19, in <module>
    from ansys.mapdl.core.mapdl import _MapdlCore

  File "C:\Users\...\Anaconda\lib\site-packages\ansys\mapdl\core\mapdl.py", line 16, in <module>
    from ansys.mapdl.reader.rst import Result

  File "C:\Users\...\Anaconda\lib\site-packages\ansys\mapdl\reader\__init__.py", line 8, in <module>
    from ansys.mapdl.reader.archive import (Archive, write_cmblock, write_nblock,

  File "C:\Users\...\Anaconda\lib\site-packages\ansys\mapdl\reader\archive.py", line 20, in <module>
    from ansys.mapdl.reader import _reader, _archive

  File "ansys\mapdl\reader\cython\_reader.pyx", line 1, in init ansys.mapdl.reader._reader

**ValueError:** numpy.ndarray size changed, may indicate binary incompatibility. Expected 96 from C header, got 88 from PyObject

---

System Information:

• Numpy version: 1.20.1
• Ansys version: 2020R2
• PyMAPDL version: 0.61.3
• Spyder version: 4.2.5
• Python version: 3.8.8

Thank´s for helping!

[germa89]

Hi @herttim

Could you try to update numpy is:

pip install --upgrade numpy

Ref: https://stackoverflow.com/questions/66060487/valueerror-numpy-ndarray-size-changed-may-indicate-binary-incompatibility-exp

[herttim]

Updating numpy worked for me. Now numpy is running on 1.22.3. Product: ANSYS Mechanical Enterprise Solver MAPDL Version: 20.2 ansys.mapdl Version: 0.61.3 Maybe an automatic update or match of different numpy versions could be useful while downloading for future.

Thank´s for your help! :)

[germa89]

I'm happy it helps! We will review our numpy requirements. Thank you!