Github user khalidhuseynov commented on the issue:
https://github.com/apache/zeppelin/pull/1304
@corneadoug I've just tried the scenario you have, and it was running
correctly (without np) when you switch to different revisions. the only thing
is that it was running the `head` version which is expected behaviour. so could
you check it out again? possibly that np error was due to different problem.
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