Enhancement Request: Add the duplicate name to the error message.
The message looks like this:
Exception in thread “main” java.lang.IllegalArgumentException: Scenario names must be unique but found a duplicate
It would be very helpful if it said which name was duplicated. I’ve got 20+ in one simulation, and it would be nice to know what I’m looking for. 
Hi John !
Indeed, knowing which scenario names are duplicated would be nice.
As always, contributions are welcomed
Little hint : https://github.com/gatling/gatling/blob/master/gatling-core/src/main/scala/io/gatling/core/scenario/Simulation.scala#L101 
Cheers,
Pierre
What’s really odd is, there wasn’t really a duplicate. I could not figure it out, and yet eventually the problem went away. Go figure!
Maybe some Zinc incremental compilation issue.
Hmm. That would be very bad. How could I rule that out?
That’s just purely hypothetical. Zinc uses sbt’s incremental compiler, so it’s quite safe…
If you have a doubt, you can clean the target directory to trigger a full compilation.