Can't see the training progress on a CNN using the trainingNetwork command. message "plot error. training continues unaffected"

im using convolutional neuronal networks (CNNs). when i make a training using trainNetwork y can not see the trainging progress. it send mte de next message. "plot error. training continues unaffected". even the examples can not show me the trainging progress plot. i attach an image of the problem. if someone have solved it please share whit me.

[Bhargavi Maganuru]

Can you share the warnings that showed up in the command window?

[César Eduardo Herández González]

sorry for the late response. these are the warnings.

Warning: Index in position 1 exceeds array bounds (must not exceed 1). 
> In nnet.internal.cnn.util/TrainingPlotReporter/cleanUpAfterPlotError (line 140)
  In nnet.internal.cnn.util/TrainingPlotReporter/reportIteration (line 83)
  In nnet.internal.cnn.util/VectorReporter/computeAndReport (line 56)
  In nnet.internal.cnn.util/VectorReporter/reportIteration (line 20)
  In nnet.internal.cnn/Trainer/train (line 142)
  In trainNetwork>doTrainNetwork (line 260)
  In trainNetwork (line 168)
  In SandBox (line 42) 

it cames several times but all the warnings are the same.

[Bhargavi Maganuru]

When you try to close the main plot figure during training, plotting error may occur without affecting the training. Also make sure you're not trying to access any data with the index exceeding its length.

[César Eduardo Herández González]

i dont close the plot figure during training, and im trying to do the matlab examples using matlab´s code.

[Ali Al-Saegh]

Have you solved the problem? because the same thing is happining with me!

[Abhipsa]

Hey, can you let me know the MATLAB version that you are using?