Hi I am rather new to Julia and I am experimenting with NLopt. I ran the tests on github and they work fine but then I tried my own objective and constraints. function ps(x,grad) return x[1] end function ps_con(x,grad,w) f=zeros(2) f[1]=x[2]^2-1+x[3] f[2]=-10x[2]^2+0.1x[3] z=-f+w*x[1] retu…

Try to call the function and constraint with the values you supplied to see if there is an error in them.

See the vector valued constraints section . These (in)equality constraints expect first argument to be returned vector.

already done that and the function outputs the expected value with no error

ok I can try, this is the part I was not sure about, in fact I thought the the syntax I was using use equivalent to declaring a vector constraint but I will try to follow the example you suggested

I tested these new functions function ps(x::Vector,grad::Vector) if length(grad)>0 grad[1]=1 grad[2]=0 grad[3]=0 end return x[1] end function ps_con(z::Vector,x::Vector,grad::Matrix,w::Vector) if length(grad)>0 grad[1,1]=w[1] grad[2,2]=20x[2] grad[1,2]=-2x[2] grad[1,3]=-1 grad[2,1]=w[…

[image] Massimiliano_Vasile: I tested these new functions function ps(x::Vector,grad::Vector) if length(grad)>0 grad[1]=1 grad[2]=0 grad[3]=0 end return x[1] end function ps_con(z::Vector,x::Vector,grad::Matrix,w::Vector) if length(grad)>0 grad[1,1]=w[1] grad[2,2]=20*x[2] grad[1,2]=-2*x[2] gra…

NLopt is pretty aggressive about swallowing errors in my experience. The fact that you have :FORCED_STOP and just get your inits back leads me to believe that there is an error happening somewhere. I haven’t looked at your code in detail here and am not familiar with the constraint interface in NLop…

yeh I suspected that but I tested each function individually with no error and given that I started programming in Julia on Saturday I am not that skilled yet any advice on where to look for the bug would be precious

NLopt not optimising

General Usage

nilshg December 14, 2020, 4:45pm 7

Please quote your code usingt triple backticks, it’s quite hard to read your posts (see Please read: make it easier to help you)

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NLopt not optimising

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