Exception when running lenskit-eval with the movielens dataset

Question

I'm trying to run the evaluation code in

http://lenskit.org/documentation/evaluator/quickstart/

but, after one minute or so, it finishes with an exception:

Exception in thread "main" Target "eval" does not exist in the project "null". 
    at org.apache.tools.ant.Project.tsort(Project.java:1912)
    at org.apache.tools.ant.Project.topoSort(Project.java:1820)
    at org.grouplens.lenskit.eval.EvalProject.executeTargets(EvalProject.java:168)
    at org.grouplens.lenskit.eval.cli.EvalCLI.run(EvalCLI.java:91)
    at org.grouplens.lenskit.eval.cli.EvalCLI.main(EvalCLI.java:127)

I just downloaded and unzipped ml-100k.zip, put the eval.groovy script in the same directory and run

lenskit-eval eval

I'm using lenskit 2.2 on Java 7.

What am I missing?

Cheers!!

Answer 1

The issue is the second eval - it tells the LensKit evaluator to try to run the eval target eval, which doesn't exist.

Either run:

lenskit eval

which is recommended, or the deprecated

lenskit-eval