Can't run program from QT Creator says it exited or Cannot obtain a handle to the inferior

Amartel

I have the same problem. Qt 4.8.2 + Qt-Creator 2.5.2 under WinXp.
I ran into it in two projects: both console and finishes very quickly. One of them is a test project, the other - a console project, which does not call QCoreApplication::exec() (I checked a project, which calls it - no problem there).
After rebuilding - first launching finishes well. In all others qt-creator thinks that the program is still running (and writes "Cannot obtain a handle to the inferior" in debug console) though actually it does not.
It is annoying.

3.141592

Hi there,

is there any solution to this problem?
I observed the same problem here, but the message only occurs during my QTest's.
I assume that the QTEST_APPLESS_MAIN sometimes runs into that error-message.
It seems to correlate with the presence or absence of a QCoreApplication, because if i use the same code within my Console-application the message never occurs.
Also Amartel mentioned, that his project using QCoreApplication runs without problems...

Should one file a Bug-Report here?

chakie

I see the same on Win7 using 5.0.1. For me there has been nothing but errors with 5.0.1. For instance debug/release paths are mixed up when building, this error, uic seems to create invalid ui_foo.h files etc.

monza

If you go to Projects -> build & Run and then check the Run settings, make sure that the Executable being called in the Run configuration is the same one for the build configuration e.g. ./debug/<your_app.exe> (use absolute path) for a debug configuration

wakeuky

There have been a few related issues. I had the "handle" issue among others when moving to 5.0.1. I resolved using the following steps.

Clean project
Close QtCreator
Remove Release/Debug Folder from app directory
Delete xxx.pro.user file (lives in app directory)
Manually delete Makefile, Makefile.Debug, Makefile.Release (If still there)
Open Qt Creator again and open your project. It should now be asking you to reconfigure your project build settings.
Also, check your environment variables – ensure they are updated for 5.0.1 paths.
"Reference to similar problem":http://qt-project.org/forums/viewthread/25326/
"Reference to another similar problem":http://qt-project.org/forums/viewthread/25058/

tesmai4

Thanks Wakeuky for step by step reply.

It is not working in my case.
I could debug/run my project; made some changes in the code and then this error appeared.
Can there any other reasons for this problem?

wakeuky

Hi tesmal4, it has been quite a while since I have seen this issue. This issue occurred for me when I had created a project under the 4.8.4 environment and tried opening the project under 5.0.1.

I am no using the latest 5.1.1 release and have had no issues of the sort. What version was your project created under?
What version are you currently trying to use?

tesmai4

Qt 4.7.4 for Desktop MinGW 4.4 and Qt Creator 2.4.1 . I did not change any configuration for the project. I only made changes in the cpp file.

tesmai4

I accidentally deleted DLL path. Now its working fine.
Thanks for your help and advice.

Regards

jcga

teslmai4: I have the same kind of problem with Qt 5.5.0. Can you please indicate what DLL path you delete?

Saber Lee

I have same issue.
And I copy my own DLL file to app-out-dir.
then this issue can to solute.

jayt

Seems likely that it is not a real "problem" but can be due to your application exiting too quickly when being run under QtCreator, please see this link
(http://stackoverflow.com/questions/21539162/qt-creator-code-is-running-but-i-get-an-error-message-from-the-ide