Error in prediction (Evaluate tab)

[Antonio Javier González Ferrer]

Hello,

I'm new in Rattle and I was testing with the weather dataset. I did a Tree exploration and then I wanted to make a prediction. So, a click in the 'Evaluate' tab and then I selected 'Score'. In the Data line, a selected 'Enter' because I wanted to insert manually the information. 

In the Data Editor, there was a filled row. I inserted another different row with random information. My goal was to predict if RainTomorrow. So, I did not fill this box. I closed the window and a error happened:

E142: A command has failed

'Error in cbind(sdata, scores) : object 'sdata' not found'

I have tried just with just the default raw, but it does not work.

Could anyone help me?

Thanks,

A. Javier