QT Installerframework is altering my string slashes

[Sally]

Hi,

I'm trying to creating a bundle for my software with the QT installer framework. I have a couple of .msi files that I want to install and everything goes fine during installation.

However when i try to uninstall these .msi files with the maintaincetool I get the following error:
Created warning message box "installationErrorWithRetry": "Installer Error", "Error during uninstallation process:\nExecution failed (Unexpected exit code: 1619): "msiexec /x C:/Program Files (x86)/Company/Repository/Installer/Setup.msi /q"" .

Noticeable is that the string does use the correct windows style slashes during the installation as seen below:
[7042] - arguments: msiexec, /i, C:\Program Files (x86)\Company\Repository\Installer\Setup.msi, /passive, HOST_ID=200, UNDOEXECUTE, msiexec, /x, C:\Program Files (x86)\Company\Repository\Installer\Setup.msi, /q

I made the following script for instalation:

// Utility function like QString QDir::toNativeSeparators(const QString & pathName) [static]
var Dir = new function () {
    this.toNativeSeparator = function (path) {
        if (installer.value("os") == "win")
            return path.replace(/\//g, '\\');
        return path;
    }
};

function Component()
{
}

Component.prototype.createOperations = function()
{
	component.createOperations();
							
	var packageInstaller =  Dir.toNativeSeparator(installer.value("TargetDir") + "/Installer/Setup.msi") ;	
	
	component.addElevatedOperation("Execute", "msiexec", "/i", packageInstaller, "/passive", "HOST_ID=200", 
									"UNDOEXECUTE", "msiexec", "/x", packageInstaller, "/q" );
}

I would like to use the msi file to uninstall the program and not the GUID as posted in this thread: using-msi-files-in-qt-framework-installer