Could not obtain meaningful lengthscales

[rdiaz02]

Thanks a lot for the package. I am using it to optimize xgboost hyperparameters and, in some runs, I am getting Could not obtain meaningful lengthscales. I see where that is happening in the code (

ParBayesianOptimization/R/updateGP.R

Line 88 in af44dd9

cat(" - Could not obtain meaningful lengthscales.\n")

) but I do not have any intuition of what, if anything, I should/can do.

As far as I can tell, the optimization continues and the optimized model is, anyway, better than what I started from.