Calibrate a Model - CSP - Target Markers - X and V must be of same length?

[KevMat18304]

Hi, new to BCILAB. I'm getting this error when trying to train the classifier. I'm wondering that

'X and V must be of the same length.' means.

Can someone please clarify? If this has been solved, can someone post the hyperlink?

Best,
Kevin Matsuno