Errors using tshark in QProcess

[Miss Engineer]

Hello,
I am trying to display the rtt values from a wireshark pcap file. I am using QProcess as follows:

QString exec="C:/Progra~1/Wireshark/tshark.exe";
    QStringList args;
    args<< "-r" <<qPrintable(filepath)<<"-Y"<<"tcp.analysis.ack_rtt and tcp.stream eq 0"<<"-e"<<"\"tcp.analysis.ack_rtt\""<<"-T"<<"fields"<<"> C:/it/rtt.txt";
    tshark->start(exec, args, QIODevice::ReadWrite);

QString exec="C:/Progra~1/Wireshark/tshark.exe";
    QStringList args;
    args<< "-r" <<qPrintable(filepath)<<"-Y"<<"tcp.analysis.ack_rtt and tcp.stream eq 0"<<"-e"<<"\"tcp.analysis.ack_rtt\""<<"-T"<<"fields"<<"> C:/it/rtt.txt";
    tshark->start(exec, args, QIODevice::ReadWrite);

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However, I keep getting the following error using

qDebug()<<tshark->readAllStandardError();

qDebug()<<tshark->readAllStandardError();

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tshark: Display filters were specified both with "-d" and with additional command-line arguments.

Please advise on what I may be doing wrong. Running from command line produces no errors and works just fine.