GAMS Inventory Model -

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i looking through gams inventory modelling in gams model library , trying implement similar version according our needs. there 2 plants 3 products , 6 periods determine optimal production schedule. following part of code sets /i1*i3/ j /j1*j6/;

the total inventory in every period maximum limit given ic1(j).. sum(i,x2(i,j))=l=42; ic2(j).. sum(i,y2(i,j))=l=56; code giving me optimal solution, says part being produced in plant , stored in plant b. not possible, unable model otherwise. tried using dollar operator in equation giving error of uncontrolled set constant. there way can circumvent , if part produced in plant stored in plant ? in advance.


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