Hi Siyoung,

  I also get the error you report if I try to run "devel install tut_read" twice.  The first time I run the command it works with no error.  So my guess is that you already have the tut_read bundle installed and don't need to install it again.

  It of course should work when you try to install it again (e.g. maybe you have modified the code and want to reinstall).  I've opened a ChimeraX bug report so that problem will get fixed.

https://www.rbvi.ucsf.edu/trac/ChimeraX/ticket/19534

  Tom

On Dec 21, 2025, at 7:21 AM, kkssy141--- via ChimeraX-users <chimerax-users@cgl.ucsf.edu> wrote:

Hello,

I recall installing support for the XYZ file format by following the tutorial for older versions of ChimeraX, which worked as expected:
https://www.cgl.ucsf.edu/chimerax/docs/devel/tutorials/tutorial_read_format.html

However, in recent ChimeraX versions (1.10 and 1.11), the same procedure no longer works. When running devel install, I encounter the below error message.
I was wondering whether the documentation might need to be updated.

Thanks.
Best,
Siyoung


```
devel install /Users/siyoungkim/Downloads/tut_read
/Applications/ChimeraX-1.11.app/Contents/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/setuptools/dist.py:759: SetuptoolsDeprecationWarning: License classifiers are deprecated.
!!

********************************************************************************
Please consider removing the following classifiers in favor of a SPDX license expression:

License :: Freeware

See https://packaging.python.org/en/latest/guides/writing-pyproject-toml/#license for details.
********************************************************************************

!!
self._finalize_license_expression()
running build
running build_py
running bdist_wheel
installing to build/bdist.macosx-10.9-universal2/wheel
running install
running install_lib
copying build/lib/chimerax/tut_read/io.py -> build/bdist.macosx-10.9-universal2/wheel/./chimerax/tut_read
Traceback (most recent call last):
File "/Applications/ChimeraX-1.11.app/Contents/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/chimerax/core/commands/devel.py", line 180, in _run
unbound_method(bb, *args, **kw)
File "/Applications/ChimeraX-1.11.app/Contents/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/chimerax/bundle_builder/bundle_builder.py", line 165, in make_install
_ = self.make_wheel(debug=debug)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Applications/ChimeraX-1.11.app/Contents/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/chimerax/bundle_builder/bundle_builder.py", line 120, in make_wheel
raise RuntimeError(f"Building wheel failed: {wheel}")
RuntimeError: Building wheel failed: ChimeraX_TutorialReadFormat-0.1-py3-none-any.whl
```
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