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https://issues.apache.org/jira/browse/MAHOUT-463?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12897385#action_12897385
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Ted Dunning commented on MAHOUT-463:
------------------------------------

This is still not enough information for anybody to help you.

Can you say more about your input data?  What did you expect to see?

How parse was the data?  How large?

What command did you use to run the program?

Are you sure that the input data was where you thought?  How do you know?

Are you sure you looked in the right place for the the output data?  How do you 
know?

 {quote}
but It can get data using the build in about Aprl.
{quote}
Also, what did you mean by this?  Is Aprl = April?  Does build = Mahout?  

> Boolean Data can not get any recommendation by running RecommnenderJob
> ----------------------------------------------------------------------
>
>                 Key: MAHOUT-463
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-463
>             Project: Mahout
>          Issue Type: Test
>          Components: Collaborative Filtering
>    Affects Versions: 0.4
>            Reporter: Hui Wen Han
>             Fix For: 0.4
>
>
> Boolean Preference Data can not get any recommendation by run RecommnenderJob,
> but It can get data using the build in about Aprl.
> It seems that it can not get any data by running RowSimilarityJob 

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