What you want to ask is what to do if matlab toolbox training fails? The method is as follows:

1. Make sure that the required toolbox is installed correctly and compatible with the version of MATLAB you are currently using. Training failed because the toolbox was not installed correctly or the version was not compatible.

2. Make sure that the input data format is correct and conforms to the data format required by the toolbox. For example, some toolboxes require that the input data be a matrix, a vector or a file in a specific format.