Optimization freezes

[epsilon64]

Hi,

I'm experiencing a problem when trying to perform a derivative free optimization using NLOPT_LN_COBYLA (code below). The optimization stops at one of the iterations and remains frozen for hours (let it run for more than 24h to make sure it wasn't computing) without throwing any error.

Has this problem ever been experienced?

Thanks
Ben

  toOpt = function(w,turnThresh,stock.data){
       tCosts(w,stock.data) * j - cPMOM(w,stock.data)
  }

  
    ineqCon = function(w,stock.data,turnThresh){
    
    rbind (cTurnover(w,turnThresh,stock.data)
           ,cSumWeights.Min(w,stock.data)
           ,cSumWeights.Max(w,stock.data)
           ,cVOL(w,stock.data)
           ,cREGION.US.Min(w,stock.data)
           ,cREGION.US.Max(w,stock.data))
    
  }
  
  resOpt <- nloptr(x0 = (max.vec + min.vec )/ 2
                   ,eval_f = toOpt
                   #,eval_g_eq = eqCon
                   ,eval_g_ineq = ineqCon
                   ,lb = min.vec
                   ,ub = max.vec
                   ,opts = list('algorithm' = 'NLOPT_LN_COBYLA',
                                #'algorithm' = 'NLOPT_GN_ORIG_DIRECT',
                                #'algorithm' = 'NLOPT_GN_ISRES',
                                'xtol_rel' = 1.0e-2,
                                'maxeval' = 2500,
                                'print_level' = 2
                                )
                   ,stock.data=res.all
                   ,turnThresh = 0.22
  )  

[Avraham Adler]

It has been over six years and we know there a suggestion that nlopt itself change some of the code. I don't think there is anything we can do in nloptr alone, and I suggest this issue be close as wontfix.