GAMS World Forum

Hi
Please, show me your code that producers the error.
Cheers
Renger

Hi Yes, this is possible. The most secure way is just summing all the values so all the items are taken from the original tabel Prices_data(centralamerica,crops,Year) = sum((AreaCode, ItemDoce, ElementCode, dollars, YearCode), Prices_data(AreaCode,centralamerica,ItemCode,crops,ElementCode,dollars,Ye...

Hi
Have a look at this post.
Cheers
Renger

Hi
You could have a look at the paper by Robinson (they also provide the code). .
Cheers
Renger

Hi I would be 100% sure that the sum over the household demands is equal to the total, e.g. parameter check(*); check("GOV_in") = sum(phh, sam("GOV_in",phh)) - sam("GOV_in","CONS"); ... and see if you assgined the values correctly. You see the infeasibility in...

Hi

You write that disaggregating the data causes problem when solving. If you set the iteration limit to zero, how big is the infeasibility of the disaggregated model? Could you attach the model?
Cheers
Renger

Hi Stef See here the equation 4. You need to use the alias. alias(t,j); eq_sum(t,k).. sum(i, sum(j$((j.val > max(1, t.val +1 )-1) and j.val < min(t.val, card(t) -d(i)+ 1)), X(i,j)) * a(i,k)) =L= r(k,t); See if this can help you formulate the other equations. Cheers Renger

Hi I assume that after assigning the value to P_1(ii) you have some more code that uses the single-valued P_1(ii). You could do this by setting all the values to zero before you assign the single-value and set them after your additional code once again to zero. loop (ii, P_1(ii) = 0; subi(ii)=yes; P...

I think it is the version. Just download a trial and see if the problem disappears, then you know at least if this is the cause.
Cheers
Renger

Hi
Did you have a look at the documentation on conic programming: Conic programming?
Cheers
Renger