[Ifeffit] Larch Mac OS X 10.15 Catalina

[Jeff Terry]

Hi Matt, 

I had to upgrade my Mac to OS X 10.15 and it blew up my Anaconda distribution which has forced me to reinstall everything from scratch.

Now whether I install larch from source or by using conda, I get the following error:

Traceback (most recent call last):
  File "/Users/jterry/anaconda3/lib/python3.7/ctypes/__init__.py", line 97, in CFUNCTYPE
    return _c_functype_cache[(restype, argtypes, flags)]
KeyError: (None, (<class 'epics.dbr.access_rights_handler_args'>,), 1)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/jterry/anaconda3/bin/larch", line 11, in <module>
    load_entry_point('xraylarch==0.9.46', 'console_scripts', 'larch')()
  File "/Users/jterry/anaconda3/lib/python3.7/site-packages/pkg_resources/__init__.py", line 489, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/Users/jterry/anaconda3/lib/python3.7/site-packages/pkg_resources/__init__.py", line 2852, in load_entry_point
    return ep.load()
  File "/Users/jterry/anaconda3/lib/python3.7/site-packages/pkg_resources/__init__.py", line 2443, in load
    return self.resolve()
  File "/Users/jterry/anaconda3/lib/python3.7/site-packages/pkg_resources/__init__.py", line 2449, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/Users/jterry/anaconda3/lib/python3.7/site-packages/larch/__init__.py", line 50, in <module>
    from . import builtins
  File "/Users/jterry/anaconda3/lib/python3.7/site-packages/larch/builtins.py", line 33, in <module>
    from . import epics
  File "/Users/jterry/anaconda3/lib/python3.7/site-packages/larch/epics/__init__.py", line 9, in <module>
    import epics
  File "/Users/jterry/anaconda3/lib/python3.7/site-packages/epics/__init__.py", line 29, in <module>
    from . import ca
  File "/Users/jterry/anaconda3/lib/python3.7/site-packages/epics/ca.py", line 761, in <module>
    dbr.access_rights_handler_args)
  File "/Users/jterry/anaconda3/lib/python3.7/site-packages/epics/dbr.py", line 339, in make_callback
    return ctypes.CFUNCTYPE(None, args)(func)
  File "/Users/jterry/anaconda3/lib/python3.7/ctypes/__init__.py", line 99, in CFUNCTYPE
    class CFunctionType(_CFuncPtr):
TypeError: item 1 in _argtypes_ passes a struct/union with a bitfield by value, which is unsupported.



I think that line 11 is:  load_entry_point('xraylarch==0.9.46', 'console_scripts', 'larch')()

Any ideas on how to address this issue?

Thanks,

Jeff

Jeff Terry
Professor of Physics, Illinois Institute of Technology 
terryj at iit.edu



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