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what is the solution? anyone can help me
asmaulkhusnah35
Member Posts: 1 
Learner I
in Help
Answers
If you want to do any modeling, you need to specify the label (or target) attribute.
In RapidMiner you can use "Set Role" and select the attribute and the "label" role.
Regards,
Balázs
as @BalazsBarany said, you need to use "Set Role" operator and right to your window into Parameters, select "label".
Also in the notification you have, many times if you click "More info" , rapidminer gives you a possible solution if you just click "Help me Fix it" after "More info".
Hope it helps.