qt5 impossible to execute the code because Qt5WebEngineCore.dll

CentreFF · 24 Apr 2021, 10:15

Hi,

I just purchased a new laptop Windows 10 64b where I need to transfer my code.

I developed a PyQT5 GUI with Python 3.7

My new laptop is Python 3.9 and when I execute the python script, I get now an error message:

https://prnt.sc/11ytg1d

Error message is in french. It says "qt5 impossible to execute the code because Qt5WebEngineCore.dll can't be found..."

So I installed the qt5 framework, mingw-w64, qt5 designer (34 Go). I added path in environment variable.

I searched for solution on Google. I found only some dll download websites. Nothing serious to explain me the issue.

I made a pip freeze for you:

altgraph==0.17
Appium-Python-Client==1.1.0
backcall==0.2.0
cachetools==4.2.1
certifi==2020.12.5
cffi==1.14.5
chardet==4.0.0
colorama==0.4.4
configparser==5.0.2
cookies==2.2.1
crayons==0.4.0
cryptography==3.4.7
decorator==5.0.7
fake-useragent==0.1.11
future==0.18.2
getmac==0.8.2
gevent==21.1.2
google-api-core==1.26.3
google-api-python-client==2.2.0
google-auth==1.29.0
google-auth-httplib2==0.1.0
googleapis-common-protos==1.53.0
greenlet==1.0.0
httplib2==0.19.1
idna==2.10
ipython==7.22.0
ipython-genutils==0.2.0
jedi==0.18.0
mysql-connector-python==8.0.24
Nuitka==0.6.14.4
numpy==1.20.2
packaging==20.9
pandas==1.2.4
parso==0.8.2
pefile==2019.4.18
pickleshare==0.7.5
Pillow==8.2.0
progress==1.5
prompt-toolkit==3.0.18
protobuf==3.15.8
psutil==5.8.0
pyasn1==0.4.8
pyasn1-modules==0.2.8
pycairo==1.20.0
pycparser==2.20
pycryptodome==3.10.1
pycryptodomex==3.10.1
Pygments==2.8.1
pyinstaller==4.3
pyinstaller-hooks-contrib==2021.1
pyparsing==2.4.7
PyQt5==5.15.4
PyQt5-Qt5==5.15.2
PyQt5-sip==12.8.1
PyQtWebEngine==5.15.4
PyQtWebEngine-Qt5==5.15.2
pytesseract==0.3.7
python-dateutil==2.8.1
pytz==2021.1
pywin32==300
pywin32-ctypes==0.2.0
requests==2.25.1
rsa==4.7.2
selenium==3.141.0
six==1.15.0
traitlets==5.0.5
Unidecode==1.2.0
uritemplate==3.0.1
urllib3==1.26.4
wcwidth==0.2.5
webdriver-manager==3.4.0
wget==3.2
zope.event==4.5.0
zope.interface==5.4.0

Here are the folders of necessary software:

Does anyone can help me to run my Python script properly. It runs fine on my old laptop, but not on new ones.

jsulm · 24 Apr 2021, 10:26

@CentreFF said in qt5 impossible to execute the code because Qt5WebEngineCore.dll:

PyQT5

Since you're using PyQt you need to make sure your PyQt installation contains Qt5WebEngineCore. Installing Qt framework has no effect on your PyQt installation.

CentreFF · 24 Apr 2021, 10:46

@jsulm Thank you for helping. the problem is when I run python in terminal and import QtWebEngineCore, I don't get any error message.

When I run the script from PyCHarm, I don't get the "Cannot find dll" error.

jsulm · wrote on 24 Apr 2021, 10:46

@CentreFF Then are you sure you use the correct Python interpreter when you start your PyQt app?

CentreFF · wrote on 24 Apr 2021, 10:49

I installed Python 3.9 from WIndows Store.
I uninstalled it.
Download the 3.7 from python.org.
Now it works! :-)

Thanks for your help