NullPointerException in process with GSP

cjcj Member Posts: 1 Contributor I
edited November 2018 in Help

I'm using RapidMiner 5.1.014 and tried to create a process including Generalized Sequential Patterns. I'm using a very simple test source containing examples of the following form:
Customer (polynominal)Time (numeric)Item (polynominal)
I retrieve the data, use the Nominal2Binominal operator on the column item and then feed this into the GSP operator. In the GSP operator, I set "customer id" to my attribute "Customer" and "time attribute" to my attribute "Time". When running this process, I get a message that my process failed and the log contains:

[tt]Jan 9, 2012 5:50:11 PM SEVERE: Here:          Process[1] (Process)
          subprocess 'Main Process'
            +- Retrieve[1] (Retrieve)
            +- Nominal to Binominal[1] (Nominal to Binominal)
      ==>  +- GSP[1] (Generalized Sequential Patterns)
Jan 9, 2012 5:50:11 PM SEVERE: java.lang.NullPointerException[/tt]

Did anyone run into similar problems and can provide a solution? I searched the forum and internet, but couldn't find any pointers for what I'm doing wrong.

Thanks a lot,


  • YuaNWAYuaNWA Member Posts: 1 Contributor I
    Did you fill in your max, min gap and window?

    I was facing the same problem and filled those fields in with 0. After which the nullpointerexception stopped and I managed to get some results.
  • Nils_WoehlerNils_Woehler Member Posts: 463 Maven

    without a short process that can reproduce the bug as it is described here in our Read before posting post (,4654.0.html)
    it is hard to tell if the bug still exists in the most recent version 5.2.009.

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