PM: warning

andrea_colettaandrea_coletta Member Posts: 17 Contributor II
edited November 2018 in Help
I have created a cross validation process with a regression learner, using the Performance (Regression) operator. When this operator has executed RapidMiner  launch a warning message like this:
PM WARNING: SimpleCriterion: Deviation of Performance was NaN!

there's someone who can help me?

Thank you
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