simplify_paths_rdp breaks: compas_cgal.polylines not in published cgal 0.9.1

[nacholopes]

Hi,

Fresh install of compas_slicer 0.8.0 with compas_cgal 0.9.1 (latest on PyPI) and simplify_paths_rdp fails on import:

ModuleNotFoundError: No module named 'compas_cgal.polylines'

The polylines module exists on cgal's main branch but was never part of a release — 0.9.1 is from June 2025 and doesn't include it (see compas-dev/compas_cgal#67).

simplify_paths_rdp.py does a hard import with no fallback, so it breaks immediately. The other usage in interpolation_print_organizer.py is fine since it has a try/except.

Probably just needs a new cgal release, or a fallback in the meantime.

Env: macOS M3, Python 3.9, compas 2.15.1, compas_cgal 0.9.1, compas_slicer 0.8.0

[jf---]

hi @nacholopes, yes exactly right Petras just released it the other day.
apologies for the belated reply