Qt5/C++ - Signals and slots, QMainwindow to QDialog

[jimbo]

Qt5 5.70
Qt Creator 4.1.0

Hello,

I've got a modal QDialog on top of a QMainwindow.
I start a mainwindow QProcess from the QDialog, this seems to work.
I'd like to get the value from the QMainwindow/QProcess to show on on the QDialog QProgressBar.
So far, no luck.
I'm obviously missing sommething and would appreciate some help.
Thanks in advance.

Regards

mainwinndow .cpp
void MainWindow::readyReadStandardOutput4() //slot
{
    QString temp = process->readAllStandardOutput();
    outputList = temp.split("per");
 
    qDebug() << outputList.at(0).toInt();
    emit progressUpdate(outputList.at(0).toInt());
}
 
mainwinndow .hpp
signals:
    void progressUpdate(int);
 
QDebug output:
1
2
...
...
99
100

mainwinndow .cpp
void MainWindow::readyReadStandardOutput4() //slot
{
    QString temp = process->readAllStandardOutput();
    outputList = temp.split("per");

    qDebug() << outputList.at(0).toInt();
    emit progressUpdate(outputList.at(0).toInt());
}

mainwinndow .hpp
signals:
    void progressUpdate(int);
	
QDebug output:
1
2
...
...
99
100

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noobsForm .cpp
    QObject::connect(&mainwindow, SIGNAL(progressUpdate(int)),
                     this, SLOT(updateProgress(int)));
 
void noobsForm::updateProgress(int value) //slot
{
    ui->progressBar->setValue(value);
    qDebug() << "value " << value;
}
 
noobsForm .hpp
public slots:
    void updateProgress(int);

noobsForm .cpp
    QObject::connect(&mainwindow, SIGNAL(progressUpdate(int)),
                     this, SLOT(updateProgress(int)));

void noobsForm::updateProgress(int value) //slot
{
    ui->progressBar->setValue(value);
    qDebug() << "value " << value;
}

noobsForm .hpp
public slots:
    void updateProgress(int);

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