libgcc_s_seg-1.dll was not found issue

[lukutis222]

Hello. I have been playing around with QT Creator for a few days and managed to create a very simple program. I have decided to test it and deploy it. I have followed this video:
https://www.youtube.com/watch?v=rFHPOZoqzcg

What I have done:

1. Build the project in release configuration.
2. Execute windeployqt.exe command in powershell

PS C:\Qt\6.3.1\mingw_64\bin> .\windeployqt.exe "C:\Users\petrikas.lu\Desktop\WORK\QT\UTB\build-UTB_gui-Desktop_Qt_6_3_1_MinGW_64_bit-Release\release\UTB_gui.exe"
C:\Users\petrikas.lu\Desktop\WORK\QT\UTB\build-UTB_gui-Desktop_Qt_6_3_1_MinGW_64_bit-Release\release\UTB_gui.exe 64 bit, release executable
Adding Qt6Svg for qsvgicon.dll
Direct dependencies: Qt6Core Qt6Gui Qt6SerialPort Qt6Widgets
All dependencies   : Qt6Core Qt6Gui Qt6SerialPort Qt6Widgets
To be deployed     : Qt6Core Qt6Gui Qt6SerialPort Qt6Svg Qt6Widgets
Warning: Cannot find GCC installation directory. g++.exe must be in the path.
Updating Qt6Core.dll.
Updating Qt6Gui.dll.
Updating Qt6SerialPort.dll.
Updating Qt6Svg.dll.
Updating Qt6Widgets.dll.
Updating opengl32sw.dll.
Updating D3Dcompiler_47.dll.
Creating directory C:/Users/petrikas.lu/Desktop/WORK/QT/UTB/build-UTB_gui-Desktop_Qt_6_3_1_MinGW_64_bit-Release/release/iconengines.
Updating qsvgicon.dll.
Creating directory C:/Users/petrikas.lu/Desktop/WORK/QT/UTB/build-UTB_gui-Desktop_Qt_6_3_1_MinGW_64_bit-Release/release/imageformats.
Updating qgif.dll.
Updating qico.dll.
Updating qjpeg.dll.
Updating qsvg.dll.
Creating directory C:/Users/petrikas.lu/Desktop/WORK/QT/UTB/build-UTB_gui-Desktop_Qt_6_3_1_MinGW_64_bit-Release/release/platforms.
Updating qwindows.dll.
Creating directory C:/Users/petrikas.lu/Desktop/WORK/QT/UTB/build-UTB_gui-Desktop_Qt_6_3_1_MinGW_64_bit-Release/release/styles.
Updating qwindowsvistastyle.dll.
Creating C:\Users\petrikas.lu\Desktop\WORK\QT\UTB\build-UTB_gui-Desktop_Qt_6_3_1_MinGW_64_bit-Release\release\translations...
Creating qt_ar.qm...
Creating qt_bg.qm...
Creating qt_ca.qm...
Creating qt_cs.qm...
Creating qt_da.qm...
Creating qt_de.qm...
Creating qt_en.qm...
Creating qt_es.qm...
Creating qt_fa.qm...
Creating qt_fi.qm...
Creating qt_fr.qm...
Creating qt_gd.qm...
Creating qt_he.qm...
Creating qt_hr.qm...
Creating qt_hu.qm...
Creating qt_it.qm...
Creating qt_ja.qm...
Creating qt_ko.qm...
Creating qt_lv.qm...
Creating qt_nl.qm...
Creating qt_nn.qm...
Creating qt_pl.qm...
Creating qt_pt_BR.qm...
Creating qt_ru.qm...
Creating qt_sk.qm...
Creating qt_tr.qm...
Creating qt_uk.qm...
Creating qt_zh_CN.qm...
Creating qt_zh_TW.qm...
PS C:\Qt\6.3.1\mingw_64\bin>

In my release folder, Some new files were created:

I have tried to launch UTB_gui and get the following error:

Could someone clarify to me what could be the issue here?

[jsulm]

@lukutis222 Seems like you also need to copy libgcc_s_seh-1.dll into your app folder.

[lukutis222]

@jsulm
I figured that much. Is there any particular reason why I need to manually copy this file while others do not need to do that?

Also, do you know where can I find this dll file?

[jsulm]

@lukutis222 I don't know why it is not copied.
You can find it in your MinGW installation, simply search for it in Windows Explorer.

[lukutis222]

@jsulm
I got it to work. Thank you very much :)