Dll loading error with pyinstaller + ctypes.cdll

by Martin Fitzpatrick Last updated Sep 17 PyQt5 FAQ

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He_Han | 2021-01-14 08:31:32 UTC | #1

When I try to running exe file which created with pyinstaller+pyqt5, always has error messages like

Traceback (most recent call last):

File "PyInstaller\loader\pyiboot01_bootstrap.py", line 144, in init

File "ctypes__init__.py", line 373, in init

FileNotFoundError: Could not find module './FSetAccessibility.dll' (or one of its dependencies). Try using the full path with constructor syntax.

But when I run the program with IDE, or run the exe file in my personal notebook, it is running with no any error.. I already tried (https://github.com/pyinstaller/pyinstaller/wiki/Recipe-Win-Load-External-DLL), still not working...

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please help... OTL

martin | 2021-01-21 15:23:48 UTC | #2

Hi @He_Han

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That's an unusual error -- when I Google it, all I find is this post :D

Do you have any idea what FSetAccessibility.dll is ? These kinds of errors not happening on your own computer are because you have that file available (probably under /Windows/System/ or /Windows/System32) but other computers do not.

We either need to figure out how to package that file with your software, or figure out what we need to change so that file isn't needed.

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Dll loading error with pyinstaller + ctypes.cdll was written by Martin Fitzpatrick .

Martin Fitzpatrick has been developing Python/Qt apps for 8 years. Building desktop applications to make data-analysis tools more user-friendly, Python was the obvious choice. Starting with Tk, later moving to wxWidgets and finally adopting PyQt. Martin founded PythonGUIs to provide easy to follow GUI programming tutorials to the Python community. He has written a number of popular Python books on the subject.

Dll loading error with pyinstaller + ctypes.cdll was published in faq on January 14, 2021 (updated September 17, 2024) . Feedback & Corrections can be submitted here.

pyqt5 pyqt pyinstaller packaging python qt qt5 pyqt5-packaging