How to fix NoSuchMethodError?

Question

I use Scala 2.10.0RC1 and sbt 0.12.1. What causes and how can I fix this runtime error (runs fine on 2.9.2)?

The exact error message is:

java.

Answer 1

You're running the code with the wrong Scala version. This can have several causes:

• misconfiguration of the project with sbt – search for 2.9.2 in config files
• stale cache used by sbt – sbt reboot
• something else?

If you meticulously check all your sbt configuration files for 2.9.2 and then wipe out all caches, things should run better. Dependencies usually have a version number in the name of the jar file, so running a find on your system will likely point you to the ones you missed.