tensorRT-mobileNet-SSD parse model failed

[Ghustwb]

Asserion ‘engine’failed
ICudaEngine* engine = builder->buildCudaEngine( *network );
assert(engine);

void TensorNet::caffeToTRTModel(const std::string& deployFile, const std::string& modelFile, const std::vector<std::string>& outputs,
                                unsigned int maxBatchSize)
{
    IBuilder* builder = createInferBuilder(gLogger);
    INetworkDefinition* network = builder->createNetwork();

    ICaffeParser* parser = createCaffeParser();
    parser->setPluginFactory(&pluginFactory);

    bool useFp16 = builder->platformHasFastFp16();
    useFp16 = false;

    DataType modelDataType = useFp16 ? DataType::kHALF : DataType::kFLOAT;

    std::cout << deployFile.c_str() <<std::endl;
    std::cout << modelFile.c_str() <<std::endl;
    std::cout << "Start Parse Network"<<std::endl;
    const IBlobNameToTensor* blobNameToTensor =	parser->parse(deployFile.c_str(),
                                                              modelFile.c_str(),
                                                              *network,
//                                                              DataType::kHALF);
                                                              DataType::kFLOAT);

    assert(blobNameToTensor != nullptr);
    std::cout << "Here : 3" <<std::endl;
    for (auto& s : outputs) network->markOutput(*blobNameToTensor->find(s.c_str()));

    builder->setMaxBatchSize(maxBatchSize);
    builder->setMaxWorkspaceSize(10 << 20);
    std::cout << "Here : 4"<< std::endl;
    if(useFp16)
    {
        builder->setHalf2Mode(true);
    }
    ICudaEngine* engine = builder->buildCudaEngine( *network );
    std::cout << "Here : 5"<<std::endl;
    assert(engine);
    network->destroy();
    parser->destroy();
    gieModelStream = engine->serialize();
    engine->destroy();
    builder->destroy();
    pluginFactory.destroyPlugin();
    shutdownProtobufLibrary();
    std::cout << "Parsed Finished" <<std::endl;
}

build cudaEngine failed
anyone help me? thanks