Welcome to the Treehouse Community
The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

Leon Kamerlin
18,728 PointsI can't run the app
When I run the app I got this error message:
Exception in thread "main" java.lang.IllegalArgumentException: Parameter 'url' must not be null! at org.apache.commons.csv.Assertions.notNull(Assertions.java:35) at org.apache.commons.csv.CSVParser.parse(CSVParser.java:202) at com.teamtreehouse.challenges.highscores.service.ScoreService.getParser(ScoreService.java:28) at com.teamtreehouse.challenges.highscores.service.ScoreService.getCSVStream(ScoreService.java:32) at com.teamtreehouse.challenges.highscores.service.ScoreService.getScoreStream(ScoreService.java:59) at com.teamtreehouse.challenges.highscores.service.ScoreService.getAllScores(ScoreService.java:65) at com.teamtreehouse.challenges.highscores.Main.main(Main.java:12) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
Dinu Comendant
6,049 PointsDinu Comendant
6,049 PointsI have the same problem Jennifer Nordell Steve Hunter