Hi everybody. When I run the code below, KNITRO finds 4 and 2 as
multipliers, but for some reason "display _con" shows 0 and 0 instead.
If I change KNITRO's algorithm from 1 to 2 or 3, then the right
multipliers appear in "display _con". Any ideas?
Best,
Guilherme
### BEGIN CODE #####
var x;
var y;
maximize
obj: -( (x + 1)^2 + (2*y + 1)^2 );
subject to
ynonneg: -y <= 0;
xnonneg: -x <= 0;
option show_stats 1;
option solver knitroampl;
option knitro_options "alg=1 outlev=6";
solve;
printf "\n Results: \n";
display _varname, _var;
printf "\n Constraints: Slacks and Multipliers: \n";
display _conname, _con, _con.slack;
##### END CODE ######
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