Want to update Qt from 4.4.3 to 5.12

Manikanta N

Hi,

My application uses Qt 4.4.3 licensed version and we have observed that when operating on Windows 10 and Windows 2016 the application is getting crashed indefinitely.

So we thought this to be the inability of Qt 4.4.3 on Windows 10 and Windows 2016 platforms.

Did anyone else faced such issues and want to know whether our decision of updating Qt version is correct or not?If not what would be the approach to make the application support on Windows 10 and Windows 2016.

Note: Its build using Microsoft Visual Studio 6 and also uses Install Shield 2010

Thanks in advance.

JonB

@Manikanta-N
Based on nothing, I would wonder whether it's your code's fault. Didn't you try debugging it? Updating from Qt 4 to 5 may be a good idea for all sorts of reasons, whether it will solve your "crashing" is quite unknown.

jsulm

@Manikanta-N Take a look at https://wiki.qt.io/Transition_from_Qt_4.x_to_Qt5
You will also need newer Visual Studio version for Qt5 (VS2015 or VS2017 or VS2019).

Manikanta N

@jsulm

Thanks for your reply and Are you sure that Qt 5.12 cannot be used in VS 6?

sierdzio

@Manikanta-N said in Want to update Qt from 4.4.3 to 5.12:

@jsulm

Thanks for your reply and Are you sure that Qt 5.12 cannot be used in VS 6?

Yes it cannot be used with VS6. Qt 5.12 requires C++11.

jsulm

@Manikanta-N Yes.
See https://doc.qt.io/qt-5.12/windows-requirements.html

Manikanta N

@JonB

That was the first thing which we have done.But the point of crash was not the same for every user.Another interesting thing is that when the application was run setting the compatibility mode to Windows 7/8 there is no crash which further made us to believe that the code is bug free.

jsulm

@Manikanta-N You should at least try with latest Qt 4 version which is 4.8.7 as far as I know. It should work with that old Visual Studio version.

Manikanta N

@jsulm The question again will be like Does Qt 4.8.7 is supported on Windows 10 :(

JonB

@Manikanta-N
Not according to https://doc.qt.io/archives/qt-4.8/supported-platforms.html

And since you say Qt 4.8.7 I think you should read https://www.eastfist.com/qt_tutorials/index.php/2017/09/04/windows-10-drops-support-for-qt-4-8-x-after-4-8-6/, Windows 10 drops support for Qt 4.8.x after Qt.4.8.6.