class Ui::MainWindow has no member named 'lineEdit'

[BITniki]

i added some objects in mainwindow.ui

And got this error

This problem is only with new objects
There are no such problems with other projects, only with this one

tried:
Rebuild
Reopening the project
Re-entry to QT
Deleting *.pro.user

It didn't help.

[JonB]

@BITniki said in class Ui::MainWindow has no member named 'lineEdit':

This problem is only with new objects
There are no such problems with other projects, only with this one

I do not know why this is the case.

You presumably have verified that your mainwindow.cpp has #include "ui_mainwindow.h" at the start?

Make sure there is not some other ui_mainwindow.h lying around somewhere. You have discovered that lives in the build output directory. Make sure there isn't one in, say, the same source directory as your mainwindow.cpp.

Delete all files in the build output directory (not your sources directory!). That should force a full rebuild.

Other than that I don't know.

[JonB]

@BITniki
I can't tell from your screenshot, I assume you have verified that QLineEdit's name is spelled lE_Port (first char lowercase L) and not IE_Port (first char uppercase I)?

Make sure your designer changes are being saved to the .ui file, and the build is re-running the uic to process the .ui file. That generates a file named ui_mainwindow.h in the build output directory (for Debug or Release, where the .obj files are generated when compiling). Read that in and look at it. You should see it change/be regenerated any time you build after altering anything in the designer. Is that happening? What does it have in its content relating to lE_Port?

[BITniki]

@JonB
it's lowercase L in lE_Port

Sorry, I didn't quite understand you, but there my mainwindow.ui file

and my ui_mainwindow.h file

Alse, there my build settings

Hope thats help

[JonB]

@BITniki
The generated files seem to look good.

This problem is only with new objects

What you show is a warning in the editor. This will happen when you add a new object in the designer but not yet rebuilt. Ignore it for now. If you actually build your project, does it compile successfully? If not show the compiler error output.

[BITniki]

@JonB
There my compiler output

[JonB]

@BITniki said in class Ui::MainWindow has no member named 'lineEdit':

This problem is only with new objects
There are no such problems with other projects, only with this one

I do not know why this is the case.

You presumably have verified that your mainwindow.cpp has #include "ui_mainwindow.h" at the start?

Make sure there is not some other ui_mainwindow.h lying around somewhere. You have discovered that lives in the build output directory. Make sure there isn't one in, say, the same source directory as your mainwindow.cpp.

Delete all files in the build output directory (not your sources directory!). That should force a full rebuild.

Other than that I don't know.

[BITniki]

@JonB
Thanks.
I fixed the problem.
In the folder with the project, there was another ui_mainwindow.h
I don't understand how it got there, but thank you

[tsvigo2]

@BITniki , we need to rename a name_of_project.pro.user to name_of_project.pro.user.backup

[JonB]

@tsvigo2 No, @BITniki's solution weas correct. ui_....h must not be in source directory.