Hello !With the GMPL model below when we ask to display an entity with a declared "default" value we get nothing but if we indirectly reference then we get the "default" value.
==== param Jm, default 3; set J := 1..Jm; display Jm; display J; display Jm; ==== Output: ==== ... Display statement at line 3 Jm has empty content Display statement at line 4 J: 1 2 3 Display statement at line 5 Jm = 3 ... ==== Cheers !
