Error when Running Librec

[VioletViolet]

Hi. I have copied all the classes in my netbeans but when I want to run this library it says null pointer exception error. Any ideas what I should do?

[guoguibing]

Try to git the latest source codes from GitHub

[guoguibing]

And make sure that you have properly configered a ".conf" file before your run an algorithm.

[guoguibing]

The default configuration file is "librec.conf"

[8-chems]

I am facing the same problem, the example userKNN doesn't work with the default librec conf file.

[FotisSp]

I am facing the same problem! userKNN doesn't work with the default librec conf file and i also used my own conf file but i received Null Pointer Exception

rec.similarity.class=pcc
rec.neighbors.knn.number=50
rec.recommender.class=userknn
rec.recommender.similarities=user
rec.recommender.isranking=false
rec.recommender.ranking.topn=10
rec.filter.class=generic
rec.similarity.shrinkage=10

[allenjack]

Hi, Could you provide the full stack trace information?

…

On 18 December 2017 at 19:06, FotisSp ***@***.***> wrote: I am facing the same problem! userKNN doesn't work with the default librec conf file and i also used my own conf file but i received Null Pointer Exception rec.similarity.class=pcc rec.neighbors.knn.number=50 rec.recommender.class=userknn rec.recommender.similarities=user rec.recommender.isranking=false rec.recommender.ranking.topn=10 rec.filter.class=generic rec.similarity.shrinkage=10 — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#58 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AEN9vlZb3J4ppBdiUxNjSJVHRT0rnOibks5tBkcfgaJpZM4KW0t_> .

[FotisSp]

yes the stack trace is :

Exception in thread "main" java.lang.NullPointerException at net.librec.recommender.cf.UserKNNRecommender.setup(UserKNNRecommender.java:52) at net.librec.recommender.AbstractRecommender.recommend(AbstractRecommender.java:216) at Thesis.Recomendation.Recommendation.main(Recommendation.java:56)