The value obtained is incorrect.

[TonyBeen]

struct PV_RANGE_INT
{
    int32_t  nMin = 0;
    int32_t  nMax = 0;
};

RTTR_REGISTRATION
{
    rttr::registration::class_<PV_RANGE_INT>("PV_RANGE_INT")
         .constructor<>()
         .property("nMin", &PV_RANGE_INT::nMin)
         .property("nMax", &PV_RANGE_INT::nMax);
}

int main(int argc, char *argv[])
{
        rttr::type type = rttr::type::get_by_name("PV_RANGE_INT");
        if (type.is_valid())
        {
            rttr::variant range = type.create();
            type.set_property_value("nMin", range, 10);
            type.set_property_value("nMax", range, 20);

            rttr::property property_nMin = type.get_property("nMin");
            if (property_nMin.is_valid())
            {
                property_nMin.get_value(range).get_value<PV_RANGE_INT>().nMin;
            }

            rttr::property property_nMax = type.get_property("nMax");
            if (property_nMax.is_valid())
           {
                property_nMax.get_value(range).get_value<PV_RANGE_INT>().nMax;
            }

            int32_t min_value = range.get_value<PV_RANGE_INT>().nMin;
            int32_t max_value = range.get_value<PV_RANGE_INT>().nMax;

            std::cout << "nMin: " << min_value << std::endl;
            std::cout << "nMax: " << max_value << std::endl;
       }

    return 0;
}