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//testing log function; log is not defined at the its minimum
function y = fun(x)
y = log(x);
endfunction
x1 = [-10];
x2 = [0];
intcon=[1];
[xopt,fopt,exitflag,output,lambda] = intfminbnd (fun,intcon, x1, x2)
// !--error 999
// Ipopt has failed to solve the problem!
// at line 310 of function intfminbnd called by :
// [xopt,fopt,exitflag,output,lambda] = intfminbnd (fun,intcon, x1, x2)
// at line 7 of exec file called by :
// exec intfminbnd_logical9.sce
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