Change set values

[waeltaha]

Hello,

I have defined a set as follows:
set li /li4/;

Afterwards, all the equations and parameters are defined over the set li. There is a large number of equations and parameters.

Initially, I need to run the model using li4 only. Based on the output results, I need to rerun the model while redefining the set as follows:
set li /li0*li40/;

However, I'm facing an issue since I cannot redefine the same set in the same GAMS file twice. How could I resolve this?

Thank you for your assistance.

[bussieck]

Make "set li /li0*li40/;" and then a dynamic "set lirun(li);". Declare all symbols over li but when you use the symbol index over lirun. Now first you assign only li4 to lirun (lirun('li4')=yes; solve ..." and then you solve for all li: lirun(li) = yes; solve ...".

-Michael

[waeltaha]

Ok, this is useful. Thank you for your help.