How to generate Multi-Label Stream

[nino lol]

Hi, this is the command i used to generate Multi-label stream. Basically, i just use all the default settings.

WriteStreamToARFFFile -s generators.multilabel.MetaMultilabelGenerator -f /home/h/hd168/111.arff -m 3 -h -O /home/h/hd168/222.moa

However, it will lead me to this error.

Failure reason: Failed writing to file /home/h/hd168/111.arff

*** STACK TRACE ***java.lang.RuntimeException: Failed writing to file /home/h/hd168/111.arff

at moa.tasks.WriteStreamToARFFFile.doMainTask(WriteStreamToARFFFile.java:86)

at moa.tasks.MainTask.doTaskImpl(MainTask.java:50)

at moa.tasks.AbstractTask.doTask(AbstractTask.java:57)

at moa.tasks.TaskThread.run(TaskThread.java:76)

Caused by: java.lang.NullPointerException

at com.yahoo.labs.samoa.instances.SparseInstanceData.locateIndex(SparseInstanceData.java:237)

at com.yahoo.labs.samoa.instances.SparseInstanceData.setValue(SparseInstanceData.java:220)

at com.yahoo.labs.samoa.instances.InstanceImpl.setValue(InstanceImpl.java:269)

at moa.streams.generators.multilabel.MetaMultilabelGenerator.generateMLInstance(MetaMultilabelGenerator.java:274)

at moa.streams.generators.multilabel.MetaMultilabelGenerator.nextInstance(MetaMultilabelGenerator.java:228)

at moa.streams.generators.multilabel.MetaMultilabelGenerator.nextInstance(MetaMultilabelGenerator.java:46)

at moa.tasks.WriteStreamToARFFFile.doMainTask(WriteStreamToARFFFile.java:80)

... 3 more

Seems it can not set class value to an instance and the reason is in SparseInstanceData.class, the indexValues[] is null.

Does anyone has any idea about it?

[Jayk Tharwani]

i am seeking help for the same issue, kindly let me know the solution if you sorted out! thank you

[Osman Batur İnce]

The problem still persists and the issue is not solved with the offered solutions on GitHub.

Have you been able to solve this issue?