lingo 提示 no feasible solution found怎么办，但是约束应该是够的呀，急求大神解决

min=(p*t+pp*tt)/2940;
ay=-2*a*vx^2-2*a*xf*ax;
0.0144*vyy^2=-0.215*ayy;
ay=p*ve*@sin(i)/(m0*ve-p*t)-(k/r^2);
ax=p*ve*@cos(i)/(m0*ve-p*t);
ax+8.855*ay=-0.626124;
ayy=pp/(m0-p*t/2940-pp*tt/2940)-(k/rr^2);
vx=56.6173358;
k=49.009159*10^11;
xf=206076.8;
m0=2400;
r=1737373;
a=2.825678*10^(-7);
ve=2940;
rr=1736773;
p>1500;
p<7500;
t>0;
t<1000;
pp<7500;
pp>1500;
tt>0;
tt<300;
vyy<56;

没有可行解 你的约束里面有矛盾

@sum(num(j)|j#lt#1#and#j#gt#5:k(j))>400; 这句不对 应该是大于1且小于5吧