SET or PARAMETER

GAMS
1

Hi I with a problem that I don’t know how to declare, if is a SET or a PARAMETER.

I want that conditions result in a relation of the possibilities (t) with the arcs (nn).

Set
         n          nodes       / n1 * n3 /
         nn(n,n)    tub
         t          connection type      /  t1 * t4  /

         p(n,n,t)  connection possibilities of stretches

I’d like a relation like this (permut the connections type)

	p1	p2 	p3	..	p...	pn
n1.n2 	t1	t2 	t2	.. 	t1...	t4
n1.n3	t1	t1 	t2	.. 	t1...	t4
n2.n3 	t1	t1 	t1	..	t4...	t4;

I should test all the possibilities, with the equations and inequalities, to select just one of the possibility.
thinking now, maybe it could be variables, I don’t know, would anyone have any idea how I can get to this condition?

2

I found a solution, I tried to insert into my code
but it not worked, a error is indicated as 250
in the manual have the possibility to work with “Many-to-Many Mapping”
I insert the same exemplo of the manual and the error was the same.
but I’m using GAMS 22.5, could It (Many-to-Many Mapping) not work with this version?

exemple - manual:

Set i / i1*i4 /
j / j1*j5 /
k / k1,k2 /
h / h1*h3 /;
Set b(i,j,k), c(i,j,k,h);
Option b(i:j,k), c(b:h);
display b, c;

Error:

250  Unknown option.  valid are -
       lp = "lpname" (and for nlp, dnlp, mip, rmip etc)
       integer1 to integer5    seed
       limrow  limcol  domlim  iterlim  work (integer values)
       decimals                              (0..8)
       optca optcr
       real1 to real5   reslim  bratio       (real values)
       measure  eject                        (no values)
       sysout   solprint                     (on/off)
       solveopt                              (merge/replace)
       sparseopt                             (safe/fast)
       sparserun                             (on/off)
       "symbol":decimals:rows:columns        (display control)
       (decimals, rows, columns are integers. Number of
        displayed decimal places, labels for each row and
        for each column)



3

Hi
It looks like a newer feature as it runs fine with Gams 30.2.
Cheers
Renger