Description

AB01198:convert::derivatives  (Distribution 22.2-22.4)
Input of
  min(max(x1,x2),x3)
produced bad output in gams.gms:
   min(x1,x2,x3)

Contributor: Alex Meeraus

Small Model of Type : GAMS

Category : GAMS Test library

Main file : convert5.gms

$title 'CONVERT test suite - min(max(x1,x2),x3)' (CONVERT5,SEQ=333)

$onText
AB01198:convert::derivatives  (Distribution 22.2-22.4)
Input of
  min(max(x1,x2),x3)
produced bad output in gams.gms:
   min(x1,x2,x3)

Contributor: Alex Meeraus
$offText


Variables x1,x2,x3,objvar;
Equations  e1;

e1..  min(max(2*x1,3*x2),4*x3) =e= objvar;

Model m / all /;

x1.fx=0;x2.fx=2;x3.fx=2;objvar.fx=6;

Solve m us dnlp max objvar;

option dnlp=convert;
solve m us dnlp max objvar;

$onEcho > t1.gms
$include gams.gms
abort$(m.modelstat <> %modelStat.optimal%) 'should be optimal'
$offEcho

execute 'gams t1 lo=%gams.lo% dnlp=conopt';
abort$errorlevel 'did not work';