<![CDATA[Compiler error after reinstalling Qt]]>I recently had to reinstall Qt on my system. Was earlier using Qt creator 7.0.2 community it got upgraded to Qt Creator 12. I chose the same supporting Qt version 5.15.2 as was used before from Qt installer tool. When trying to build the project which I was working on, I get the following error:

uic: Error in line 498, column 27 : Unexpected element fontweight
File '..<projectname-removed for privacy>\settings.ui' is not valid
jom: <build path>\Makefile.Release [ui_settings.h] Error 1

jom: <build path>\Makefile [release] Error 2
16:22:07: The process "C:\Qt\Tools\QtCreator\bin\jom\jom.exe" exited with code 2.
Error while building/deploying project <project name> (kit: Desktop Qt 5.15.2 MSVC2019 64bit)
When executing step "Make"

There appears to be a mismatch in how Qt was reading UI files before and after. I checked the design file, the error is thrown for a push button randomly, whereas there are many other screens with QPushButtons.

What could be the reason for this error.. I am totally lost. Would really appreciate any help. Attaching the kits and compilers being currently usedScreenshot 2024-03-14 163429.png

]]>https://forum.qt.io/topic/155312/compiler-error-after-reinstalling-qtRSS for NodeWed, 13 May 2026 03:26:01 GMTThu, 14 Mar 2024 11:06:48 GMT60<![CDATA[Reply to Compiler error after reinstalling Qt on Mon, 18 Mar 2024 07:47:06 GMT]]>@AdviInfo said in Compiler error after reinstalling Qt:

Is there any way to import older ui files/projects as a whole to newer Qt versions?

Well doubtless not (other than using an older uic), else it would have said so? I don't know how old it is if fontweight used to exist but no longer does. Anyway, suggest you use a text editor/substitution script across your .ui files to make whatever change is necessary.

]]>https://forum.qt.io/post/793618https://forum.qt.io/post/793618Mon, 18 Mar 2024 07:47:06 GMT<![CDATA[Reply to Compiler error after reinstalling Qt on Wed, 17 Apr 2024 12:20:06 GMT]]>@JonB That actually worked. Thank you!

]]>https://forum.qt.io/post/797031https://forum.qt.io/post/797031Wed, 17 Apr 2024 12:20:06 GMT<![CDATA[Reply to Compiler error after reinstalling Qt on Mon, 18 Mar 2024 07:47:06 GMT]]>@AdviInfo said in Compiler error after reinstalling Qt:

Is there any way to import older ui files/projects as a whole to newer Qt versions?

Well doubtless not (other than using an older uic), else it would have said so? I don't know how old it is if fontweight used to exist but no longer does. Anyway, suggest you use a text editor/substitution script across your .ui files to make whatever change is necessary.

]]>https://forum.qt.io/post/793618https://forum.qt.io/post/793618Mon, 18 Mar 2024 07:47:06 GMT<![CDATA[Reply to Compiler error after reinstalling Qt on Mon, 18 Mar 2024 06:22:19 GMT]]>@JonB I checked. The project was created using an older version of Qt. The pushbuttons in designer forms had a property 'fontweight' - which doesn't come up in forms created using the newer version of qt creator which I'm using. There are numerous buttons on different screens, so it's not possible to replace them all. Is there any way to import older ui files/projects as a whole to newer Qt versions?

]]>https://forum.qt.io/post/793600https://forum.qt.io/post/793600Mon, 18 Mar 2024 06:22:19 GMT<![CDATA[Reply to Compiler error after reinstalling Qt on Mon, 18 Mar 2024 06:17:12 GMT]]>@Pl45m4 Using qmake. Tried deleting .pro user file and reselecting the required kit

]]>https://forum.qt.io/post/793598https://forum.qt.io/post/793598Mon, 18 Mar 2024 06:17:12 GMT<![CDATA[Reply to Compiler error after reinstalling Qt on Thu, 14 Mar 2024 14:30:26 GMT]]>@AdviInfo
If you can't find anything else which works. Try telling jom not to do any builds in parallel and see if that goes through. Just maybe uic was being run to generate ui_settings.h at the same time as compilation was trying to read it?

Having said that

File '..<projectname-removed for privacy>\settings.ui' is not valid

implies it does not like the content of the .ui file in the first place. Is the error repeatable? I would look at line 498, column 27 to see what is going on.

]]>https://forum.qt.io/post/793242https://forum.qt.io/post/793242Thu, 14 Mar 2024 14:30:26 GMT<![CDATA[Reply to Compiler error after reinstalling Qt on Thu, 14 Mar 2024 13:24:56 GMT]]>@AdviInfo

CMake or QMake?
If you use QMake, delete everything .pro.user related, except your *.pro file of course.

]]>https://forum.qt.io/post/793236https://forum.qt.io/post/793236Thu, 14 Mar 2024 13:24:56 GMT<![CDATA[Reply to Compiler error after reinstalling Qt on Thu, 14 Mar 2024 12:31:20 GMT]]>@jsulm Tried it many times. Didn't work

]]>https://forum.qt.io/post/793233https://forum.qt.io/post/793233Thu, 14 Mar 2024 12:31:20 GMT<![CDATA[Reply to Compiler error after reinstalling Qt on Thu, 14 Mar 2024 12:27:19 GMT]]>@AdviInfo Trx to delete the build folder and rebuild

]]>https://forum.qt.io/post/793231https://forum.qt.io/post/793231Thu, 14 Mar 2024 12:27:19 GMT