Error when using the EnergyPlus 9.4 (python library mode) in macOS 11.4

[ghost]

I run the EnergyPlus API under the following conditions.

• macOS 11.4 (apple scilicon)
• python 3.8
• EnergyPlus 9.4

The code I executed is as below.

import sys
sys.path.append("/Applications/EnergyPlus-9-4-0")
from pyenergyplus.api import EnergyPlusAPI
api = EnergyPlusAPI()

The following error message occurred.

api = EnergyPlusAPI()
---------------------------------------------------------------------------
OSError                                   Traceback (most recent call last)
~/Github/EPandPython/tmp.py in 
----> 9 api = EnergyPlusAPI()

/Applications/EnergyPlus-9-4-0/pyenergyplus/api.py in __init__(self, running_as_python_plugin)
     69                                          as this is already instantiated for Plugin workflows.
     70         """
---> 71         self.api = cdll.LoadLibrary(api_path())
     72         self.api.apiVersionFromEPlus.argtypes = [c_void_p]
     73         self.api.apiVersionFromEPlus.restype = c_char_p

~/miniforge3/envs/EPandPython/lib/python3.8/ctypes/__init__.py in LoadLibrary(self, name)
    449 
    450     def LoadLibrary(self, name):
--> 451         return self._dlltype(name)
    452 
    453 cdll = LibraryLoader(CDLL)

~/miniforge3/envs/EPandPython/lib/python3.8/ctypes/__init__.py in __init__(self, name, mode, handle, use_errno, use_last_error, winmode)
    371 
    372         if handle is None:
--> 373             self._handle = _dlopen(self._name, mode)
    374         else:
    375             self._handle = handle

OSError: dlopen(/Applications/EnergyPlus-9-4-0/libenergyplusapi.dylib, 6): no suitable image found.  Did find:
	/Applications/EnergyPlus-9-4-0/libenergyplusapi.dylib: mach-o, but wrong architecture
	/Applications/EnergyPlus-9-4-0/libenergyplusapi.dylib: stat() failed with errno=35

Does EnergyPlus API not support macOS yet?
I found the issues related to my question, but I do not know if it has improved in 9.4. (Link 1, Link 2)

[Myoldmopar]

The error message appears to be pretty clear that you are trying to run a release on the wrong architecture. EnergyPlus 9.4 was not released for m1 silicon. We don't officially have an m1 release because we don't have a testing framework available to perform routine testing/development. But one developer who does have an m1 system was kind enough to roll their own package release and post it to the 9.5 release page. Try out 9.5 and see if it works better! We routinely run the API tests on all three platforms (not m1), so hopefully it will work just fine for you.

[ghost]

Thanks. I'll try using 9.5.

[ghost]

I checked that it works well in version 9.5!

[Myoldmopar]

Great way to start the morning!

[akeomc]

I am getting a very similar error but am running python 3.9 and energyplus 22-2-0. Is there a mismatch between these architectures for a Mac M1 silicon? Thanks!

[asrjy]

Same here. Were you able to fix this?