QDialog problem

[Talei]

Try to build-> clean all/project and then rebuild, ui files are only XML's, and ui_className.h are automatically created by qDesigner (qtCreator). Sometimes that happens, and the warning say what You should do, rebuild the project.
See this: qDlgExampl..zip to get better overview how to work with signal and interact between forms.
Also use F1 (in qtCreator) on classes/methods to know what they are doing.
And read some good literature about c++/qt programming.
Best luck.

[nguyenvuduc]

I guess you have renamed your files which just changed the upper case or lower case.
That would make Qt confusing because somewhere in Qt it doesn't care about incasesitive but the file system.

So, you should check:
1) The #include statement in your source code: does include file has been renamed accordingly
2) In your .ui file: are there any line of code that reference to your file and it's name is correctly casesitive.

[feraudyh]

I would just like to add that I had this problem: The solution is to make sure that the project file and the file names of the form files have exactly the same case.