Regarding the Qt version to be used for WinCC OA

[Pradeep Kumar]

As per the documentation we need to use Qt 5.5.0 with visual studio compiler ,
as we 5.6 and 5.7 version also , why cant we use latest Qt version,
why specifically Qt 5.5.0 we need to use?

[mkoller]

We deliver Qt 5.5 so during runtime, when your ewo is loaded, there is only Qt 5.5 available.

[Pradeep Kumar]

Qt 5.5.0 32 bit or 64 bit should work, we are using Qt 5.5.0 32 bit with visual studio 2013 .

will the version of Qt also depend?

[mkoller]

I do not understand the question.

[Pradeep Kumar]

Do we need Qt 5.5.0 64 bit for WinCC OA?.

In WinCC OA docs they didnt mention about Qt bit version?.

This was my question

[mkoller]

You need to use the same bit-version as the WinCC_OA product uses, which is normally 64bit.
Since an EWO is a plugin (dll on windows) the number of bits must match with the application (UI Manager) which loads the plugin.

[Pradeep Kumar]

in the below link i downloaded qt

https://download.qt.io/archive/qt/5.5/5.5.0/

i downloaded qt-opensource-windows-x86-msvc2013_64-5.5.0.exe

it is showing 32 bit.

[Gertjan van Schijndel]

That is a 64 bit package. Where does it show 32 bit?