$offlisting * * Equation counts * Total E G L N X C B * 2 2 0 0 0 0 0 0 * * Variable counts * x b i s1s s2s sc si * Total cont binary integer sos1 sos2 scont sint * 4 4 0 0 0 0 0 0 * FX 0 * * Nonzero counts * Total const NL DLL * 7 1 6 0 * * Solve m using NLP minimizing objvar; Variables objvar,x2,x3,x4; Positive Variables x2,x3,x4; Equations e1,e2; e1.. 32.174*(255*log((0.03 + x2 + x3 + x4)/(0.03 + 0.09*x2 + x3 + x4)) + 280* log((0.03 + x3 + x4)/(0.03 + 0.07*x3 + x4)) + 290*log((0.03 + x4)/(0.03 + 0.13*x4))) + objvar =E= 0; e2.. 20*sqr((-1) + x2 + x3 + x4) =E= 0; Model m / all /; m.limrow=0; m.limcol=0; m.tolproj=0.0; $if NOT '%gams.u1%' == '' $include '%gams.u1%' $if not set NLP $set NLP NLP Solve m using %NLP% minimizing objvar;