Pyinstaller: Could not find QtWebEngineProcess.exe for PyQT5 Web Application

Question

I am developing a web application which displays a folium map. The web app has 3 tabs and each tab has a QtWebEngineView widget added into them.

I am trying to create a standalone .exe file for my web application. So I have used Pyinstaller to convert my project into a single .exe file. I already had to make some changes in my spec file to solve a previous issue (fixed). This is how the spec file looks

# -*- mode: python ; coding: utf-8 -*-

block_cipher = None


a = Analysis(['main.py'],
             pathex=['D:\\Bus_Stop_Finder'],
             binaries=[],
             datas=[('input\\stops.txt', 'input'), 
             ('input\\Suggestions.xlsx', 'input'),
             (".\\venv\\Lib\\site-packages\\branca\\*.json","branca"),
             (".\\venv\\Lib\\site-packages\\branca\\templates","templates"),
             (".\\venv\\Lib\\site-packages\\folium\\templates","templates"),
             ],
             hiddenimports=[],
             hookspath=[],
             runtime_hooks=[],
             excludes=[],
             win_no_prefer_redirects=False,
             win_private_assemblies=False,
             cipher=block_cipher,
             noarchive=False)
pyz = PYZ(a.pure, a.zipped_data,
             cipher=block_cipher)
exe = EXE(pyz,
          a.scripts,
          [],
          exclude_binaries=True,
          name='main',
          debug=False,
          bootloader_ignore_signals=False,
          strip=False,
          upx=True,
          console=True )
          
            
coll = COLLECT(exe,
               a.binaries,
               a.zipfiles,
               a.datas,
               strip=False,
               upx=True,
               upx_exclude=[],
               name='main')

On running Pyinstaller mainspec, the dist folder and main.exe file is created but once I run the the main.exe file, I am getting this error:

Could not find QtWebEngineProcess.exe

I have tried reading through the Qt Documentation for deploying Qt WebEngine Applications and noticed that

The WebEngine process is executed for each QWebEngineView or WebEngineView instance

I am not sure, where I have to make a modification or correction. Can someone help me out with this?

I was running into the same issue and ended up in using [nuitka](https://nuitka.net): `nuitka --standalone --plugin-enable=qt-plugins ` and [wrappe](https://github.com/Systemcluster/wrappe) as mentioned [here](https://github.com/Nuitka/Nuitka/issues/230#issuecomment-716303087) — Maurice Meyer, Apr 13 '21 at 10:45

Saam · Answer 1 · 2021-05-25T09:26:21.110

I had a similar problem and finally fixed it. (Python 3.9.5 & PyQt5.15.4)

Your problem is not related to the spec file modifications.

The root of the problem is the structure of generated files. more precisely in dist directory.

The QtWebEngineProcess.exe that the app_name.exe is looking for, it exists in dist>{app_name}>PyQt5>Qt>bin path, but this app cannot access it. to create this access, the following tasks must be performed:

Create text a file in dist>{app_name} directory and name it qt.conf
Enter the following text in it
```
[Paths]
Prefix = PyQt5/Qt/
```

Now the main.exe runs without any problems :)

The last Slash is optional and has no effect on the result. – Saam Jun 14 '21 at 23:52 — Saam, Jun 14 '21 at 23:52

score 1 · Answer 2 · answered May 18 '21 at 10:22

1

I was having the same problem, tried Saam's fix but apparently, the last slash is added via hooks. I add a qt.conf file in my dist/appname dir

[Paths]
Prefix = PyQt5/Qt

answered May 18 '21 at 10:22

pebbad

11
1

score 1 · Answer 3 · edited Sep 14 '21 at 05:19

1

[Paths]
Prefix = PyQt5/Qt/

You have to create a qt.conf file with the above details in it, and this file should be with your app. Example 1
Example 2

edited Sep 14 '21 at 05:19

Anonymous

738
4
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answered Sep 11 '21 at 07:09

PiedroCraft

11
2

score 0 · Answer 4 · edited May 18 '23 at 13:14

0

[Paths]

Prefix = PyQt5/Qt/

After debug

The path is correct but the file name after debug is created as 'Qt5'. It should be changed to 'Qt'

Change folder name 'Qt5' to 'Qt'

edited May 18 '23 at 13:14

moken

3,227
8
13
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answered May 15 '23 at 08:11

Serkan Yasar

1
1

Pyinstaller: Could not find QtWebEngineProcess.exe for PyQT5 Web Application

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