QWT plugin into QT Designer specified module could not be found

DSpider

I am trying to use QWT plugin within QT Designer. I followed all the doc steps, I compiled the plugin and modified the PATHs as follows:

PATH=C:\Qwt-6.1.3\lib
QT_PLUGIN_PATH=C:\Qwt-6.1.3\plugins
QMAKEFEATURES=C:\Qwt-6.1.3\features

However, when I launch QT Creator, the plugin could not be loaded correctly. I get the message:

Can not load library .... The specified module could not be found.
I don't see where the problem can be.

Any help will be more than appreciated.

mrjj

Hi and welcome to the forums
You compiled it with same compiler as Creator and in Release mode ?
alt text

DSpider

@mrjj thank you for your answer.

I used the same compiler (MSVC2015) as the one used to compile as shown in the pic.

The config file in windows says that both debug & release modes are compiled. Should I changed it to the release only ?

win32 {
    # On Windows you can't mix release and debug libraries.
    # The designer is built in release mode. If you like to use it
    # you need a release version. For your own application development you
    # might need a debug version. 
    # Enable debug_and_release + build_all if you want to build both.

    CONFIG           += debug_and_release
    CONFIG           += build_all
}

jsulm

@DSpider Did you use same Qt version also?

DSpider

@jsulm Not sure how to do this. Do I need to specify it in the qwt.build ?

I have now another problem when trying to compile with nmake.

......\Qt\5.11.2\msvc2015\include\QtCore\qglobal.h(45): fatal error C1083: can not open file include : 'type_traits' : No such file or directory

I saw that I should specify in the .build file to use c++11 which I did, the problem persists.

Can this be related to the Qt version ?

Best regards

DSpider

I finally managed to compile it.
Just by executing VsVars32.bat before compilation, this is supposed to load environment variables. I followed this answer.

Thank you all for your help.

Pablo J. Rogina

@DSpider great! please don't forget to mark your post as solved. Thanks.