No file or variants found for asset: app/app.zip.

[Slakeec]

PS C:\Users\user\PycharmProjects\MSM> flet build windows -vv
Flutter bootstrap directory: C:\Users\user\AppData\Local\Temp\flet_flutter_build_arrvgVFfgq
Creating Flutter bootstrap project...OK
Customizing app icons and splash images...OK
Generating app icons... ╔════════════════════════════════════════════════════════════════════════════╗
║ The Dart tool uses Google Analytics to report feature usage statistics ║
║ and to send basic crash reports. This data is used to help improve the ║
║ Dart platform and tools over time. ║
║ ║
║ To disable reporting of analytics, run: ║
║ ║
║ dart --disable-analytics ║
║ ║
╚════════════════════════════════════════════════════════════════════════════╝

Resolving dependencies in C:\Users\user\AppData\Local\Temp\flet_flutter_build_arrvgVFfgq... (2.8s)
Got dependencies in C:\Users\user\AppData\Local\Temp\flet_flutter_build_arrvgVFfgq.
Building package executable... (2.2s)
Built flutter_launcher_icons:flutter_launcher_icons.
════════════════════════════════════════════
FLUTTER LAUNCHER ICONS (v0.13.1)
════════════════════════════════════════════

• Creating default icons Android
• Overwriting the default Android launcher icon with a new icon
• Overwriting default iOS launcher icon with new icon
Creating Icons for Web...
Creating Icons for Windows...
Creating Icons for MacOS...

✓ Successfully generated launcher icons
OK
Packaging Python app...Building package executable... (1.3s)
Built serious_python:main.
Running package command
Creating asset directory: C:\Users\user\AppData\Local\Temp\flet_flutter_build_arrvgVFfgq\app
Copying Python app from C:\Users\user\PycharmProjects\MSM to C:\Users\user\AppData\Local\Temp\serious_python_temp24caec34
Error: FileSystemException: Failed to decode data using encoding 'utf-8', path = 'C:\Users\user\AppData\Local\Temp\serious_python_temp24caec34\requirements.txt'
Deleting temp directory C:\Users\user\AppData\Local\Temp\serious_python_temp24caec34
OK
Building Windows app...['C:\Users\user\Desktop\flut\flutter\bin\flutter.BAT', 'build', 'windows']
Resolving dependencies...
fl_chart 0.65.0 (0.66.0 available)
flutter_lints 2.0.3 (3.0.1 available)
flutter_native_splash 2.3.7 (2.3.9 available)
js 0.6.7 (0.7.0 available)
lints 2.1.1 (3.0.0 available)
matcher 0.12.16 (0.12.16+1 available)
material_color_utilities 0.5.0 (0.8.0 available)
meta 1.10.0 (1.11.0 available)
package_info_plus 4.2.0 (5.0.1 available)
path 1.8.3 (1.9.0 available)
petitparser 5.4.0 (6.0.2 available)
test_api 0.6.1 (0.7.0 available)
toml 0.14.0 (0.15.0 available)
web 0.3.0 (0.4.0 available)
web_socket_channel 2.4.0 (2.4.3 available)
xml 6.3.0 (6.5.0 available)
Got dependencies!
16 packages have newer versions incompatible with dependency constraints.
Try flutter pub outdated for more information.

windows/flutter/CMakeLists.txt does not use FLUTTER_TARGET_PLATFORM, updating.
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppBuild.targets(541,5): warning MSB8029: �஬������ ��⠫�� ��� ��⠫�� ��室� �� ����� �ᯮ�������� �� �६����� ��⠫���, ��⮬� �� �� ����� ���� ��稭
�� �஡��� � ������筮� ᡮમ�. [C:\Users\user\AppData\Local\Temp\flet_flutter_build_arrvgVFfgq\build\windows\x64\ZERO_CHECK.vcxproj]
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppBuild.targets(541,5): warning MSB8029: �஬������ ��⠫�� ��� ��⠫�� ��室� �� ����� �ᯮ�������� �� �६����� ��⠫���, ��⮬� �� �� ����� ���� ��稭
�� �஡��� � ������筮� ᡮમ�. [C:\Users\user\AppData\Local\Temp\flet_flutter_build_arrvgVFfgq\build\windows\x64\plugins\serious_python_windows\CopyPythonDLLs.vcxproj]
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppBuild.targets(541,5): warning MSB8029: �஬������ ��⠫�� ��� ��⠫�� ��室� �� ����� �ᯮ�������� �� �६����� ��⠫���, ��⮬� �� �� ����� ���� ��稭
�� �஡��� � ������筮� ᡮમ�. [C:\Users\user\AppData\Local\Temp\flet_flutter_build_arrvgVFfgq\build\windows\x64\flutter\flutter_assemble.vcxproj]
Error detected in pubspec.yaml:
No file or variants found for asset: app/app.zip.
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(254,5): error MSB8066: ���짮��⥫�᪠� ᡮઠ ��� "C:\Users\user\AppData\Local\Temp\flet_flutter_build_arrvgVFfgq\build\windows
x64\CMakeFiles\97ccedc66f37bc442ea4e473dec1ca92\flutter_windows.dll.rule;C:\Users\user\AppData\Local\Temp\flet_flutter_build_arrvgVFfgq\build\windows\x64\CMakeFiles\9736cc717a512a8e02eaa94d6095a866\flutter_assemble.rule;C:\Users\u
ser\AppData\Local\Temp\flet_flutter_build_arrvgVFfgq\windows\flutter\CMakeLists.txt" �����訫� ࠡ��� � ����� 1. [C:\Users\user\AppData\Local\Temp\flet_flutter_build_arrvgVFfgq\build\windows\x64\flutter\flutter_assemble.vcxproj]
Building Windows application... 61,3s
Build process failed.
Deleting Flutter bootstrap directory C:\Users\user\AppData\Local\Temp\flet_flutter_build_arrvgVFfgq
Error building Flet app - see the log of failed command above.
PS C:\Users\user\PycharmProjects\MSM>

[FeodorFitsner]

OK, this part worries me:

Error: FileSystemException: Failed to decode data using encoding 'utf-8', path = 'C:\Users\user\AppData\Local\Temp\serious_python_temp24caec34\requirements.txt'

What do you have in requirements.txt?

[Slakeec]

anyio==4.2.0
arrow==1.3.0
binaryornot==0.4.4
certifi==2023.11.17
chardet==5.2.0
charset-normalizer==3.3.2
click==8.1.7
colorama==0.4.6
cookiecutter==2.5.0
et-xmlfile==1.1.0
exceptiongroup==1.2.0
flet==0.18.0
flet-core==0.18.0
flet-runtime==0.18.0
h11==0.14.0
httpcore==0.17.3
httpx==0.24.1
idna==3.6
Jinja2==3.1.2
markdown-it-py==3.0.0
MarkupSafe==2.1.3
mdurl==0.1.2
numpy==1.26.3
oauthlib==3.2.2
openpyxl==3.1.2
packaging==23.2
pandas==2.1.4
Pygments==2.17.2
pypng==0.20220715.0
python-dateutil==2.8.2
python-slugify==8.0.1
pytz==2023.3.post1
PyYAML==6.0.1
qrcode==7.4.2
repath==0.9.0
requests==2.31.0
rich==13.7.0
six==1.16.0
sniffio==1.3.0
text-unidecode==1.3
types-python-dateutil==2.8.19.20240106
typing_extensions==4.9.0
tzdata==2023.4
urllib3==2.1.0
watchdog==3.0.0
websocket-client==1.7.0
websockets==11.0.3

[FeodorFitsner]

Alright, please see "no pip freeze" note in this section: https://flet.dev/docs/guides/python/packaging-app-for-distribution#project-structure

Also, save requirements.txt in UTF-8 encoding.

[taaaf11]

@FeodorFitsner I think, the culprit is powershell (it is my assumption). Because powershell uses UTF-16 encoding when Write-Output is used.

[FeodorFitsner]

@taaaf11 that makes sense when you do pip freeze from PS! Let's wait for confirmation and then create a new issue for that.

[taaaf11]

@FeodorFitsner I think I am getting the issue... I pip freeze > requirements.txt-ed from my virtual environment. Opened the file in python prompt. f.read() function gave a lot of \x-s, and f.encoding gave cp1252.

[FeodorFitsner]

@taaaf11 yep, but in context of flet buid requirements.txt is opening from Dart ;)

[taaaf11]

@FeodorFitsner I fear replying, I don't know Dart 🤐

[Slakeec]

Thank you very much for your advices.This time I made requirements file manually as it is in description and also got this error:

windows/flutter/CMakeLists.txt does not use FLUTTER_TARGET_PLATFORM, updating.
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppBuild.targets(541,5): warning MSB8029: �஬������ ��⠫�� ��� ��⠫�� ��室� �� ����� �ᯮ�������� �� �६����� ��⠫���, ��⮬� �� �� ����� ���� ��稭
�� �஡��� � ������筮� ᡮમ�. [C:\Users\user\AppData\Local\Temp\flet_flutter_build_hIKxvCPIMT\build\windows\x64\ZERO_CHECK.vcxproj]
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppBuild.targets(541,5): warning MSB8029: �஬������ ��⠫�� ��� ��⠫�� ��室� �� ����� �ᯮ�������� �� �६����� ��⠫���, ��⮬� �� �� ����� ���� ��稭
�� �஡��� � ������筮� ᡮમ�. [C:\Users\user\AppData\Local\Temp\flet_flutter_build_hIKxvCPIMT\build\windows\x64\plugins\serious_python_windows\CopyPythonDLLs.vcxproj]
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: ��室 �� ������� "setlocal [C:\Users\user\AppData\Local\Temp\flet_flutter_build_hIKxvCPIMT\build\w
indows\x64\plugins\serious_python_windows\CopyPythonDLLs.vcxproj]
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: "C:\Program Files\Microsoft Visual Studio\2022\Community\Common7\IDE\CommonExtensions\Microsoft\C
Make\CMake\bin\cmake.exe" -E make_directory C:/Users/user/AppData/Local/Temp/flet_flutter_build_hIKxvCPIMT/build/windows/x64/runner/Release [C:\Users\user\AppData\Local\Temp\flet_flutter_build_hIKxvCPIMT\build\windows\x64\plugins
serious_python_windows\CopyPythonDLLs.vcxproj]
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: if %errorlevel% neq 0 goto :cmEnd [C:\Users\user\AppData\Local\Temp\flet_flutter_build_hIKxvCPIMT
\build\windows\x64\plugins\serious_python_windows\CopyPythonDLLs.vcxproj]
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: "C:\Program Files\Microsoft Visual Studio\2022\Community\Common7\IDE\CommonExtensions\Microsoft\C
Make\CMake\bin\cmake.exe" -E copy_directory C:/Users/user/AppData/Local/Temp/flet_flutter_build_hIKxvCPIMT/build/windows/x64/python/Lib C:/Users/user/AppData/Local/Temp/flet_flutter_build_hIKxvCPIMT/build/windows/x64/runner/Releas
e/Lib [C:\Users\user\AppData\Local\Temp\flet_flutter_build_hIKxvCPIMT\build\windows\x64\plugins\serious_python_windows\CopyPythonDLLs.vcxproj]
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: if %errorlevel% neq 0 goto :cmEnd [C:\Users\user\AppData\Local\Temp\flet_flutter_build_hIKxvCPIMT
\build\windows\x64\plugins\serious_python_windows\CopyPythonDLLs.vcxproj]
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: "C:\Program Files\Microsoft Visual Studio\2022\Community\Common7\IDE\CommonExtensions\Microsoft\C
Make\CMake\bin\cmake.exe" -E copy_directory C:/Users/user/AppData/Local/Temp/flet_flutter_build_hIKxvCPIMT/build/windows/x64/python/DLLs C:/Users/user/AppData/Local/Temp/flet_flutter_build_hIKxvCPIMT/build/windows/x64/runner/Relea
se/DLLs [C:\Users\user\AppData\Local\Temp\flet_flutter_build_hIKxvCPIMT\build\windows\x64\plugins\serious_python_windows\CopyPythonDLLs.vcxproj]
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: if %errorlevel% neq 0 goto :cmEnd [C:\Users\user\AppData\Local\Temp\flet_flutter_build_hIKxvCPIMT
\build\windows\x64\plugins\serious_python_windows\CopyPythonDLLs.vcxproj]
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: IF "release" == "release" DEL "C:/Users/user/AppData/Local/Temp/flet_flutter_build_hIKxvCPIMT/bui
ld/windows/x64/runner/Release/DLLs*d.*" /S /Q [C:\Users\user\AppData\Local\Temp\flet_flutter_build_hIKxvCPIMT\build\windows\x64\plugins\serious_python_windows\CopyPythonDLLs.vcxproj]
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: if %errorlevel% neq 0 goto :cmEnd [C:\Users\user\AppData\Local\Temp\flet_flutter_build_hIKxvCPIMT
\build\windows\x64\plugins\serious_python_windows\CopyPythonDLLs.vcxproj]
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: DEL "C:/Users/user/AppData/Local/Temp/flet_flutter_build_hIKxvCPIMT/build/windows/x64/runner/Rele
ase/DLLs*.ico" /S /Q [C:\Users\user\AppData\Local\Temp\flet_flutter_build_hIKxvCPIMT\build\windows\x64\plugins\serious_python_windows\CopyPythonDLLs.vcxproj]
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: if %errorlevel% neq 0 goto :cmEnd [C:\Users\user\AppData\Local\Temp\flet_flutter_build_hIKxvCPIMT
\build\windows\x64\plugins\serious_python_windows\CopyPythonDLLs.vcxproj]
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: DEL "C:/Users/user/AppData/Local/Temp/flet_flutter_build_hIKxvCPIMT/build/windows/x64/runner/Rele
ase/DLLs*.cat" /S /Q [C:\Users\user\AppData\Local\Temp\flet_flutter_build_hIKxvCPIMT\build\windows\x64\plugins\serious_python_windows\CopyPythonDLLs.vcxproj]
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: if %errorlevel% neq 0 goto :cmEnd [C:\Users\user\AppData\Local\Temp\flet_flutter_build_hIKxvCPIMT
\build\windows\x64\plugins\serious_python_windows\CopyPythonDLLs.vcxproj]
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: DEL "C:/Users/user/AppData/Local/Temp/flet_flutter_build_hIKxvCPIMT/build/windows/x64/runner/Rele
ase/DLLs\tcl86t.dll" /Q [C:\Users\user\AppData\Local\Temp\flet_flutter_build_hIKxvCPIMT\build\windows\x64\plugins\serious_python_windows\CopyPythonDLLs.vcxproj]
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: if %errorlevel% neq 0 goto :cmEnd [C:\Users\user\AppData\Local\Temp\flet_flutter_build_hIKxvCPIMT
\build\windows\x64\plugins\serious_python_windows\CopyPythonDLLs.vcxproj]
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: DEL "C:/Users/user/AppData/Local/Temp/flet_flutter_build_hIKxvCPIMT/build/windows/x64/runner/Rele
ase/DLLs\tk86t.dll" /Q [C:\Users\user\AppData\Local\Temp\flet_flutter_build_hIKxvCPIMT\build\windows\x64\plugins\serious_python_windows\CopyPythonDLLs.vcxproj]
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: if %errorlevel% neq 0 goto :cmEnd [C:\Users\user\AppData\Local\Temp\flet_flutter_build_hIKxvCPIMT
\build\windows\x64\plugins\serious_python_windows\CopyPythonDLLs.vcxproj]
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: :cmEnd [C:\Users\user\AppData\Local\Temp\flet_flutter_build_hIKxvCPIMT\build\windows\x64\plugins
serious_python_windows\CopyPythonDLLs.vcxproj]
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone [C:\Users\user\AppData\Local\Temp\flet
flutter_build_hIKxvCPIMT\build\windows\x64\plugins\serious_python_windows\CopyPythonDLLs.vcxproj]
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: :cmErrorLevel [C:\Users\user\AppData\Local\Temp\flet_flutter_build_hIKxvCPIMT\build\windows\x64\p
lugins\serious_python_windows\CopyPythonDLLs.vcxproj]
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: exit /b %1 [C:\Users\user\AppData\Local\Temp\flet_flutter_build_hIKxvCPIMT\build\windows\x64\plug
ins\serious_python_windows\CopyPythonDLLs.vcxproj]
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: :cmDone [C:\Users\user\AppData\Local\Temp\flet_flutter_build_hIKxvCPIMT\build\windows\x64\plugins
\serious_python_windows\CopyPythonDLLs.vcxproj]
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: if %errorlevel% neq 0 goto :VCEnd [C:\Users\user\AppData\Local\Temp\flet_flutter_build_hIKxvCPIMT
\build\windows\x64\plugins\serious_python_windows\CopyPythonDLLs.vcxproj]
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: :VCEnd" � ����� 1. [C:\Users\user\AppData\Local\Temp\flet_flutter_build_hIKxvCPIMT\build\windows
x64\plugins\serious_python_windows\CopyPythonDLLs.vcxproj]
Building Windows application... 65,1s
Build process failed.
Deleting Flutter bootstrap directory C:\Users\user\AppData\Local\Temp\flet_flutter_build_hIKxvCPIMT
Error building Flet app - see the log of failed command above.

[Slakeec]

somehow the project was built (but with errors during building) and now when i am trying to start an exe file. mt app just blinks on startup and then closes itself. What could be a problem with that?

[taaaf11]

@Slakeec Make your requirements.txt hand-picked, like, if you are using packages flet and flask, include the packages in requirements.txt like this (put in the versions):

flet==(some ver)
flask==(some ver)

Also, edit your second-last comment and put necessary code formatting like this:

• Surround the error message text (the full output) with three backticks (this ``` ).

[gu1llermo]

windows/flutter/CMakeLists.txt does not use FLUTTER_TARGET_PLATFORM, updating.
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppBuild.targets(541,5): warning

Please correct the inverted slash thing.
If it is / just use that one
But if it's \ just that, nothing else please