problem on making an object

[rezaMSLM]

hello
I want to make an object of

 QModbusClient

in my Code. I have added these to my code:

Header:	#include <QModbusClient>
qmake:	QT += serialbus

when I use this code in my *.h file:

QModbusClient *ModbusObject;

Receive No Error but if use this:

QModbusClient *ModbusObject = new QModbusClient();

Receive ERROR:

...\mainwindow.h:31: error: invalid new-expression of abstract class type 'QModbusClient'
     QModbusClient *ModbusObject = new QModbusClient();

                                                 ^

why?

[jsulm]

@rezaMSLM As the error message says: QModbusClient is an abstract class.
See https://doc.qt.io/qt-5/qmodbusclient.html#details
You can create instances of QModbusRtuSerialMaster and QModbusTcpClient.