ImportError: dlopen... symbol not found in flat namespace

[Se7enYXS]

When running kcc-c2e.py v5.6.2 on my Mac, there's an error :

Traceback (most recent call last):
File "/Users/se7en/Downloads/kcc-master/kcc-c2e.py", line 33, in
startC2E()
File "/Users/se7en/Downloads/kcc-master/kindlecomicconverter/startup.py", line 47, in startC2E
from .comic2ebook import main
File "/Users/se7en/Downloads/kcc-master/kindlecomicconverter/comic2ebook.py", line 45, in
from . import image
File "/Users/se7en/Downloads/kcc-master/kindlecomicconverter/image.py", line 23, in
import mozjpeg_lossless_optimization
File "/opt/homebrew/lib/python3.11/site-packages/mozjpeg_lossless_optimization/init.py", line 1, in
from .mozjpeg_opti import optimize
File "/opt/homebrew/lib/python3.11/site-packages/mozjpeg_lossless_optimization/mozjpeg_opti.py", line 1, in
from ._mozjpeg_opti import lib, ffi
ImportError: dlopen(/opt/homebrew/lib/python3.11/site-packages/mozjpeg_lossless_optimization/_mozjpeg_opti.abi3.so, 0x0002): symbol not found in flat namespace '_jpeg_copy_critical_parameters'

I already installed all requirements.

There's no issue when running kcc-c2e.py v5.5.2.

Seems like an issue with mozjpeg-lossless-optimization package.

[Se7enYXS]

Interestingly looks like you are using homebrew python too. I wonder if normal python works. Are you on m2 Mac mini too? Or any m2?

I'm using M1 Mac mini.

After trying this method , everything works fine now.

[axu2]

Thanks for confirming m1. I'm surprised you are the only other one to report this. Can you add m1 to the title? Apple silicon

[Se7enYXS]

Thanks for confirming m1. I'm surprised you are the only other one to report this. Can you add m1 to the title?

Already change the title. Thanks for your help.

[axu2]

Actually, I uninstalled everything in homebrew, I had some jpeg related stuff installed related to the Portal port.
I also uninstalled homebrew python, using python.org version instead.
Now it works. No clue why. Maybe just a slightly newer version of python fixed it.

Can @Se7enYXS help me figure out which part caused the error? Please try normal python.

Also @vinhtq115 did you run into this issue? Which python version did you use?

[vinhtq115]

Actually, I uninstalled everything in homebrew, I had some jpeg related stuff installed related to the Portal port. I also uninstalled homebrew python, using python.org version instead. Now it works. No clue why. Maybe just a slightly newer version of python fixed it.

Can @Se7enYXS help me figure out which part caused the error? Please try normal python.

Also @vinhtq115 did you run into this issue? Which python version did you use?

I haven’t run into this issue yet. I am using Python 3.11.4 from Homebrew. Also, I always create a virtual environment from that Python for compiling kcc.

[Se7enYXS]

@axu2

Can confirm, python 3.11.4 from python.org works fine, does not need this method, just pip3 install mozjpeg-lossless-optimization, then every thing works.

[darodi]

it seems resolved
closing this.

reopen if needed

[Observer5]

my python version is 3.10.13
ImportError: dlopen(/opt/homebrew/lib/python3.10/site-packages/mozjpeg_lossless_optimization/_mozjpeg_opti.abi3.so, 0x0002): symbol not found in flat namespace '_jpeg_CreateCompress'

[axu2]

@Observer5 Please try latest python 3.11. I use 3.11.4

3.12 isn't supported yet.