no member named 'errorOccurred' in 'QAbstractSocket'

[SPlatten]

I'm following the information on this site:
https://doc.qt.io/qt-5/qtnetwork-fortuneclient-example.html

My class is derived from QTcpSocket:

    class clsModHelper : public QTcpSocket {
    Q_OBJECT

    protected:
        ...
        void cleanup();
        void start();

    public slots:
        void dataIn();
        void errorOccurred(QAbstractSocket::SocketError socketError);
        ....

The same file with the class prototype also includes the headers:

#include <QCoreApplication>
#include <QAbstractSocket>
#include <QDataStream>
#include <QTcpSocket>

In the implementation:

connect(this, &QIODevice::readyRead, this, &clsModHelper::dataIn);
connect(this, &QAbstractSocket::errorOccurred, this, &clsModHelper::errorOccurred);

The line containing the connect for the errorOccurred is highlighted red with the message:

no error named 'errorOccurred' in 'QAbstractSocket'

Yes according to:

https://doc.qt.io/qt-5/qabstractsocket.html

Yes there is...whats wrong?

[SPlatten]

@SPlatten , oh, I see, it was introduced in Qt 5.15, I'm still on Qt 5.14...will switch.

[Christian Ehrlicher]

Then please mark this topic as solved. Thx.