RapidMiner 9.8 Beta is now available

Be one of the first to get your hands on the new features. More details and downloads here:


Why do I get this warning that the length of my time series is -1 ?

peterdwpeterdw Member Posts: 5 Newbie
edited June 6 in Help
I am trying to do a Forecast Validation on an ARIMA model.
This is my main process.

I definitely got data in my Excel.

Why this warning ?

If I run it then this error appears.



  • mschmitzmschmitz Administrator, Moderator, Employee, RapidMiner Certified Analyst, RapidMiner Certified Expert, University Professor Posts: 2,636  RM Data Scientist
    Hi @peterdw,

    these are two different things. The first warning comes, because RapidMiner does not know the length of your excel file. Then it warns you that it may be too short. Did you run the wizard?

    The second one is an error of the ARIMA operator you likely run inside. It just fails to find a solution.

    - Head of Data Science Services at RapidMiner -
    Dortmund, Germany
Sign In or Register to comment.