NullPointerException in process with GSP
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