python

[igghcz]

Windows 10 64-bit with Python 3.14 already installed; a system-wide shared installation with the PATH set. The installer forced the installation of Python 3.12 and created a venv with modules. However, the modules and Python version in the environment do not match.
Apparently, only version 3.12 is supported. The documentation states: Python 3.12 — 15 to 20% faster on mesh calculations. So this probably doesn’t mean Python 3.12–3.15pre :(

[Ypsos]

Hello,

Thank you for the report.

What you observed is expected behaviour, not a bug.

Ortho4XP V3 is designed to run inside its own isolated Python 3.12 environment (venv).
The installer deliberately looks for Python 3.12 (or 3.11 as fallback) and creates a dedicated venv with the required modules. Your system-wide Python 3.14 is intentionally left untouched.

Reasons:
• Python 3.12 is the version we target and test (documented performance gain of 15–20 % on mesh calculations).
• Many scientific packages we depend on (numpy, scipy, rasterio, shapely, etc.) do not yet provide stable wheels for Python 3.14.
• Using a private venv guarantees that Ortho4XP does not interfere with your other Python installations.

So:
– The installer forcing Python 3.12 is correct.
– The modules being installed inside the venv (and not in your system Python 3.14) is also correct.
– You do not need to change your system Python.

Just launch Ortho4XP with the provided launcher (the one created by the installer). It will use the venv automatically.

If something still fails when you start Ortho4XP itself (not during installation), please send the content of the file ortho4xp_install.log and Ortho4XP.log and we will look further.

Best regards