Due to recent updates, all users are required to create an Altair One account to login to the RapidMiner community. Click the Register button to create your account using the same email that you have previously used to login to the RapidMiner community. This will ensure that any previously created content will be synced to your Altair One account. Once you login, you will be asked to provide a username that identifies you to other Community users. Email us at Community with questions.
NullPointerException in process with GSP
Learner III
Hi,
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:
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,
Conny
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) |
| customer1 | 1 | book |
| customer1 | 2 | laptop |
| customer1 | 3 | chips |
| customer2 | 1 | book |
[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,
Conny
0
Answers
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.
without a short process that can reproduce the bug as it is described here in our Read before posting post (http://rapid-i.com/rapidforum/index.php/topic,4654.0.html)
it is hard to tell if the bug still exists in the most recent version 5.2.009.
Best,
Nils