lingo错误代码11：a syntax error has occured

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lingo错误代码11：a syntax error has occured
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;
[OBJ] min=@sum(link(i,j):c(i,j)*((x(j)-a(i))^2+(y(j)-b(i))^2)^(1/2));
@For(demand(i):[DEMAND_CON]@sum(supply(j):c(i,j))=d(i););
@for(supply(i):[SUPPLY_CON]@sum(demand:(j):a(j)));
@for(supply(i):
@bnd(@min(demand(j):a(j)),x(i),@max(demand(j):a(j)));
@bnd(@min(demand(j):a(j)),y(i),@max(demand(j):a(j)));
);
END
我这是一个字也不差照着书上抄的,但是Lingo说[OBJ]的中括号似乎有问题,这是怎么回事啊.我一点也不懂Lingo,

恐怕不是一字不差吧你的init段结束要写endinit你写了吗
后面也有多冒号的还设有根本不是等式或者不等式的

lingo错误代码11：a syntax error has occured lingo中错误代码11,Invalid input .A syntax error has occured.3] I/ lingo a syntax error has occurred lingo 的错误代码 error 11 lingo 程序出错 syntax error has occurred （急!在线等）用lingo 10.0建模时出现以下错误：invalid input.A syntax error has PDroidPatcher 出现错误错误代码如下： An unexpected error occured. Meth An undefined error has occured lingo 错误代码11 lingo错误代码11 lingo8.0错误11 Invalid input.A syntax error has occurred 哪里有错误 - Syntax error on token ",",< expected - This method has a c