Unable to start application from Creator

Hjortronsylt

Hello people,
I'm a hobbyist that have programmed less than three weeks. I moved from QT 4.8 to 5 recently and I noticed that sometimes applications does not start.
When I move the libraries to the /bin folder after build and launch it manually it seems to work.

I have added: C:\qt\qt5.6.3\5.6.3\mingw49_32\bin;C:\Qt\Qt5.6.3\5.6.3\mingw49_32\bin
to system variable, but that did not help.

It looks like a setup error somewhere. Where should I look?

koahnig

@Hjortronsylt

Hi and welcome to devnet forum

From Qt creator typically you should be able to run all applications. Most people have problems to start applications without creator.

Did everything work fine with Qt 4.8?
The problem started after installing Qt 5? What is the actual subversion?

In Qt creator you should check under "tools"->"options"->"Build&run" the different taps. Look out for warnings and error messages.
Most likely the setup is not correct.

Hjortronsylt

I have done some troubleshooting.
It does seem isolated to the library testlib maybe.

When i run it with

QT += core testlib

it does not open.
But running with that library it does seem to work :S
But with another say network

QT += core network

It does work for some reason. Any clues?

koahnig

@Hjortronsylt

Well libraries are simply not interchangable. Each library does hold a couple of objects defining typically the functionality given in the general naming.

Some namings may have changed between Qt4 and Qt5, but not network to anything.

Also when your application is requiring network functionality, but is missing it in the link process, you should see somewhere error messages.

I would suggest that it is best when you are checking out examples from the tutorials. There are the network examples and there is the testlib functionality
however, Qt offers more different aspects and it may make sense for you to check out those as well.