Error when executing bayesopt

I am running bayesopt and have encoutered the following error several times. It happens only when I use the runParallel option. Could anyone help me with that?

Dot indexing is not supported for variables of this type.

Error in BayesianOptimization/fitObjectiveFcnGP (line 2657)

KernelParameters = ObjectiveFcnGP.KernelInformation.KernelParameters;

Error in BayesianOptimization/fitGPModels (line 2600)

this.ObjectiveFcnGP = fitObjectiveFcnGP(this, BullAdjustment, BullAdjustmentN, useFitMethodNone);

Error in BayesianOptimization/chooseNextPoint (line 2295)

this = fitGPModels(this, true, BullAdjustmentN, false);

Error in BayesianOptimization/chooseNextPointParallel (line 2353)

BO2 = chooseNextPoint(BO2);

Error in BayesianOptimization/runParallel (line 2095)

this = chooseNextPointParallel(this);

Error in BayesianOptimization/run (line 1939)

this = runParallel(this);

Error in BayesianOptimization (line 457)

this = run(this);

Error in bayesopt (line 323)

Results = BayesianOptimization(Options);

[Don Mathis]

Could you post some executable MATLAB code that illustrates the problem?

[Weiqi Zhao]

Hi Stephen, were you able to solve this issue? I unfortunately got the same error. Thanks!

[Walter Roberson]

A common cause of this kind of message is if a stage returns an empty array when the code expects it to return a struct or object.

[Mohammad Beit Sadi]

I get the same error and the XAtMinObjective is an empty array. I have rectified the issue by picking XAtMinEstimatedObjective when that happens.

I don't know why XAtMinObjective is an empty array though. Is it because there are multiple X values where the minimum happens?