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Accepted answer

turns out this problem occurred because i put the sbt-launch.jar in the lib directory for my scala installation. once i moved it into another directory scala worked fine.

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did you set the scala_home environment variable to point to the correct directory?

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did you have an older version installed? if that's still on your path then it may be causing problems...

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can you paste the contents of your path and classpath environment variables? perhaps using pastie or pastebin if they're on the large side.

you should also update to java 1.6.0_22 if at all possible, due to this bug which was present in update 21: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6969236


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