Installation and Deployment

One other thing you can do is check whether you get the same issue with the latest LTS.

Hi, You should also start your application with the QT_DEBUG_PLUGINS environment variable set to 1. That will give you information about what is happening.

Hi, you could try tracing the loading of plugins, to see what the problem is, open a CMD window and type SET QT_DEBUG_PLUGINS=1 then launch your QtGuiApplication2.exe from the same CMD window. To see the output of the trace, you need to download and start DebugView

Hi Try to remove "C:\Users\USERNAME\AppData\Roaming\Qt\qtaccount.ini" (copy it first to somewhere to be able to put it back if it explodes :)

Hi and welcome to the forums You could try another mirror and see if that helps https://forum.qt.io/topic/43349/slow-downloads-with-the-online-installer-try-this-tool

The information is more clearly available now with the dev branch (which is Qt 6 development). A third option is to build qtbase first and then the other modules.

Hi @Sakazuki please show your .pro file.

@hanch You can see that there are several bugs reported: https://bugreports.qt.io/browse/QTIFW-1164?jql=text ~ "select mirror" I agree this is an issue and should be fixed. Though this forum is the wrong place to ask for features/bug fixes as it is a user forum. Use the Qt bug tracker or ask on Qt developers mailing list.

@DeveloperDeveloper35 It depends. If a lib is loaded at runtime then your app can work without it as long as it is not used. This is how plug-ins work: the app is not linked at link time against the plug-ins, instead plug-ins are loaded at runtime dynamically.

@Christian-Ehrlicher sorry I'm not being rude but that doesn't make sense (I appreciate English my not be your first language) do you mean why do I rebuild Qt multiple times ? because of changes.: upgrade qt version, change compile options change configure options use internal libpng, internal zlib internal libjpeg. quite often you build something then realise you need different options when you run up against an issue, supporting 3 operating systems with multiple permutations of each requires different build options.

Can you give more details than "cannot work" ?

@mahesh_j If you have a commercial license then you should ask Qt Company, not here in user forum.

I did it by installing 32 bit qt on another system thank you for everything !!

Just tried this: Controller.prototype.ReadyForInstallationPageCallback = function () { var page = gui.pageWidgetByObjectName("ReadyForInstallationPage"); var cancelButton = gui.findChild(page, "CancelButton"); if (cancelButton != null) { console.log("cancelButton found"); cancelButton.setEnabled(false); cancelButton.enabled = false; } else { console.log("cancelButton NOT found"); } // gui.clickButton(buttons.NextButton); } Again, the 'Cancel' button is still present/enabled.

@mourke said : They're dynamically linked libraries so they'd only be loaded once the code is called correct? No. The function pointers are resolved when your module is loaded. That's when you're getting that error. What you can do is put that troublesome part into another dll and load it dynamically (e.g. using QLibrary) only on Windows versions that support it.

Thanks man... Still don't decide which installation tool to use... may be some kind of wizard.. Thanks.

It's the first thing that gets built however, you are currently making things more complicated than necessary. You should just build the plugin using your already installed Qt rather than the full thing.

@condo4 said in Qt WebGL Streaming without GPU: I find the solution myself. great and thank you for sharing it. please don't forget to mark this post as solved then!