GAMS World Forum

Hi All, Sets i Index /1*20/ j Index /1*20/ R Index /1*20/; I want to write the code to run for all items in the set except the first item. For example Sum(i$(i gt 1),W(i)); and it was accepted. But when I wrote Y(R,I$(i gt 1),J)=L= 2*X(R,I$(i gt 1),J); It cannot accept . Y is free and x is binary. H...