我在 lingo 中输入下列编程，结果显示   NO feasible solution found !我想让大侠看看，是不是我的编程有问题，万分感激，编程如下：


model:
max=3.4138*x1+429.3427*x2+6.2485*x3+0.759*x4+13.5683*x5+151.4125*x6;
min=2342442-4.844*x1-0.095*x2-0.99*x3-0.99*x4-0.2*x5-6.132*x6;
x1+x2+x3+x4+x5+x6+x7=318372.12;
2.2364*x1+2.2364*x2+2.2364*x3+2.2364*x4+11.1145*x6<=999847;
x1+x2+x3+x4>304657.46;
x1>115300.27;
x2>1603.28;
x3>1918.28;
x4=191023.26;
x5>2764.89;
x6<=11998.16;
x6>10890.72;
x7<=59.05;
end