Unable to connect PyAnsys (PyMechanical) with ANSYS Mechanical 2025 R2 Student – Fluent works, Mecha

Prasad

Hi everyone,

I am trying to learn and build a proper automation workflow for ANSYS Mechanical using PyAnsys (PyMechanical).
My goal is to automate the Mechanical workflow using Python.

My setup

ANSYS Mechanical 2025 R2 (v252) – Student Version
Python 3.10
ansys-mechanical-core = 0.11.8
Windows Os
VS Code

What works
I am able to successfully launch and control ANSYS Fluent from VS Code using PyFluent.
Python environment and VS Code interpreter are working correctly.

The problem

When I try to launch ANSYS Mechanical using PyMechanical, I consistently face connection / launch issues.

Typical errors I encounter:

Mechanical executable path not detected automatically
gRPC / transport-related errors (when using newer PyMechanical versions)
Path validation errors even when specifying AnsysWBU.exe

I downgraded PyMechanical to 0.11.8 to avoid secure gRPC issues (since Mechanical 2025 R2 does not support secure gRPC unless SP03+), but I still cannot reliably launch or attach to Mechanical.

What I want to understand

Is there a recommended / stable way to automate Mechanical 2025 R2 Student version using PyAnsys?
Are there known limitations of PyMechanical with the Student edition (unlike Fluent)?

Is there a straightforward, supported workflow (local launch, attach to running session, batch mode, etc.) that I should follow?

Are there any specific executable paths, environment variables, or settings required for Student installations?

Is full automation is not supported for Student Mechanical?

I would really appreciate it if someone could share:

A working example for Mechanical 2025 R2
Or a clear explanation of current limitations and best practices

dipin

Hi,

Thanks for the detailed breakdown! A few pointers to help you move forward:

1. Check the official docs firstPlease go through the gRPC security documentation here:👉 https://mechanical.docs.pyansys.com/version/stable/user_guide/remote_session/grpc_security.html

This explains exactly why you're hitting transport/gRPC errors — Mechanical 2025 R2 requires SP03 or later for secure gRPC. Without it, you need to explicitly disable secure channel in your connection call.

2. Share your exact error message "gRPC / transport-related errors" is too broad to diagnose. Please paste the full traceback so we can pinpoint whether it's a path issue, a security handshake failure, or a port binding problem.

3. Version/Service Pack compatibility Check the PyMechanical version support matrix:👉 https://mechanical.docs.pyansys.com/version/stable/user_guide/remote_session/grpc_security.html#version-and-service-pack-requirements

Confirm which SP your 2025 R2 Student install is on. Student editions sometimes lag behind on service packs, which directly affects gRPC support.

4. Try PyMechanical Embedded instead If remote/gRPC launch keeps failing, the embedded instance approach is often simpler and more reliable for local automation — no gRPC, no port issues:

python

import ansys.mechanical.core as mech

app = mech.App(version=252, globals=globals())

This runs Mechanical in-process and avoids the whole remote session setup. Worth trying as an alternative path.

5. Student edition limitations There are no officially documented blanket restrictions on PyMechanical with Student, but Student installs can have non-standard paths and missing features. Double-check your AWP_ROOT252 environment variable is set and points to the correct install directory.

Start with the embedded approach + share your exact error — that'll get you unstuck fastest.