Could not set default value for ns3::DropTailQueue

[amir nazari]

Hi, 

I want to run an application but I receive this error: 

msg="Could not set default value for ns3::DropTailQueue::Mode", file=../src/core/model/config.cc, line=787

this is the related part of the code: 

uint packetSize = 1.2*1024;        //1.2KB

    uint queueSizeHR = (100000*20)/packetSize;

    uint queueSizeRR = (10000*50)/packetSize;

    uint numSender = 3;

    double errorP = ERROR;

    Config::SetDefault("ns3::DropTailQueue::Mode", StringValue("QUEUE_MODE_PACKETS"));

/*

Config::SetDefault("ns3::DropTailQueue::MaxPackets", UintegerValue(queuesize));

    */

    //Creating channel without IP address

    std::cout << "Creating channel without IP address" << std::endl;

    PointToPointHelper p2pHR, p2pRR;

    p2pHR.SetDeviceAttribute("DataRate", StringValue(rateHR));

    p2pHR.SetChannelAttribute("Delay", StringValue(latencyHR));

    p2pHR.SetQueue("ns3::DropTailQueue", "MaxPackets", UintegerValue(queueSizeHR));

    p2pRR.SetDeviceAttribute("DataRate", StringValue(rateRR));

    p2pRR.SetChannelAttribute("Delay", StringValue(latencyRR));

    p2pRR.SetQueue("ns3::DropTailQueue", "MaxPackets", UintegerValue(queueSizeRR));

is there any problem with my header or installation process or something is wrong with the code? 

Thanks in advance.

[Pooriya Gholipoor]

Hi dear... can you take a snapshot from your terminal with error

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[amir nazari]

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[amir nazari]

Here are the code and snapshot.

[Adil Alsuhaim]

There's no attribute named "Mode" in the class DropTailQueue, or any of it's parent classes.

[amritpal kaur]

How to develop cluster tree topology in NS3 

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kind regards 

Amritpal Kaur

[Adil Alsuhaim]

I can't find "Mode" in ns-3.29, try an older version like ns-3.24 becaise this is probably a code written for an older ns3 version