lingo出现unexpected jacobian overflow
lingo程序总是出现unexpected jacobian overflow的错误，不知为什么？我的程序为：
model：
title location problem;
sets:
demand/1..6/:a,b,d;
supply/1..2/:x,y,e;
link(demand,supply):c;
ENDSETs
data:
a=1.25,8.75,0.5,5.75,3,7.25;
b=1.25,0.75,4.75,5,6.5,7.75;
d=3,5,4,7,6,11;
e=20,20;
enddata
init:
x,y=5,1,2,7;
endinit
min=@sum(link(i,j):c(i,j)*((a(i)-x(j))^2+(y(j)-b(i))^2)^(1/2));
@for(demand(i): @sum(supply(j):c(i,j)) =d(i););
@for(supply(i): @sum(demand(j):c(j,i)) <=e(i););
@for(supply: @bnd(0.5,X,8.75); @bnd(0.75,Y,7.75); );
end
答案标准程序为：
MODEL:
Title Location Problem;
sets:
demand/1..6/:a,b,d;
supply/1..2/:x,y,e;
link(demand,supply):c;
endsets
data:
!locations for the demand(需求点的位置);
a=1.25,8.75,0.5,5.75,3,7.25;
b=1.25,0.75,4.75,5,6.5,7.75;
!quantities of the demand and supply（供需量）;
d=3,5,4,7,6,11; e=20,20;
enddata
init:
!initial locations for the supply（初始点）;
x,y=5,1,2,7;
endinit
!Objective function（目标）;
min=@sum(link(i,j): c(i,j)*((x(j)-a(i))^2+(y(j)-b(i))^2)^(1/2) );
!demand constraints（需求约束）;
@for(demand(i): @sum(supply(j):c(i,j)) =d(i););
!supply constraints（供应约束）;
@for(supply(i): @sum(demand(j):c(j,i)) <=e(i); );
@for(supply: @bnd(0.5,X,8.75); @bnd(0.75,Y,7.75); );
END
请问下各位大侠，我的程序哪儿出错了？和答案程序有什么不同？ 意想不到的雅可比溢出
有些字母要大写 shaox 发表于 2012-8-8 14:19 static/image/common/back.gif
意想不到的雅可比溢出
有些字母要大写
lingo不是不区分大小写吗？
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