What does error code 70 mean in prawn lingo?

The second loop is wrong, and the correct one should be: @for(set2(i):@sum(link(j,i):a(j,i)*x(j))<=y(i));

error code 70 means that the number of variables you use in the program is more than the number of variables you define, as above, your x(i) can only have a maximum of 6, but you mistakenly give him the number of j, and you will have a total of 7 variables from x(0) to x(6), and there is no way to report an error.

I've changed it a little bit, and you'll see if it meets your needs:

model:

sets:set1/1..6/:x;

set2/1..7/:y;

link(set1,set2):a;

endsets

x2=1;max=@sum(set1(j):x(j));

for(set1(j):@bin(x(j)))for(set2(i):@sum(link(j,i):a(j,i)*x(j))<=y(i));

data:y=1 1 1 1 1 1 1; a=

enddata

I won't, but still smile

sets:

cang/1..3/:wet,vol;

wu/1..4/:w,v,p;

link(wu,cang):x;

endsets

data:wet=10,16,8;

vol=6800,8700,5300;

w=18,15,23,12;

v=480,650,580,390;

p=3100,3800,3500,2850;

enddata

max=@sum(wu(i):p(i)*@sum(cang(j):x(i,j)))

for(wu(i):@sum(cang(j):x(i,j))@for(cang(j):@sum(wu(i):x(i,j))@for(cang(j):@sum(wu(i):v(i)*x(i,j))@for(cang(j):

for(cang(k):

sum(wu(i):x(i,j)/wet(j))=@sum(wu(i):x(i,k)/wet(k)))

endThe k gt i in your last sentence doesn't know what it's for, do you know what i is?

There should be a semicolon at the end of the previous sentence.

The restriction variable is an integer@gin e.g. @gin(y1); gin(x1);

The reason for the occurrence of error code 108 is that the size of the model exceeds the limitation of the ** program.

Is your lingo version too low. I used lingo8 (registered) to solve and vertical, and this block can be solved.

Let's switch to a higher version.

The size of the model exceeds the limit except for the current Lingo version.

model:

sets:si/1..3/:x,y,s,a,t;

sj/1..3/;

sij(si,sj):c,f;

endsets

data:x=25 35 30;

a=5700 4850 4300;

s=30 40 40;

f=0 180 5000

enddata

min=@sum(si(i):y(i)*a(i))+2*@sum(sij(i,j):c(i,j)*f(i,j));

for(si(i):x(i)-@sum(sj(j):c(i,j))+sum(si(j):c(i,j))=y(i));

for(si(i):y(i)<=s(i));

Your constraints are basically certainly problematic and you figure it out for yourself.